{"id":1985,"date":"2024-04-11T11:49:22","date_gmt":"2024-04-11T11:49:22","guid":{"rendered":"https:\/\/certera.com\/kb\/?p=1985"},"modified":"2026-02-18T07:37:41","modified_gmt":"2026-02-18T07:37:41","slug":"how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error","status":"publish","type":"post","link":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/","title":{"rendered":"How Resolve  DLG_FLAGS_SEC_CERT_CN_INVALID Error?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Have you encountered the DLG_FLAGS_SEC_CERT_CN_INVALID error while accessing a site using Chrome, Firefox, or Microsoft Edge browsers? If affirmative, you must understand how frustrating and troublesome it can be.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So, to aid in fixing the error, in this article, we will explain what exactly the DLG_FLAGS_SEC_CERT_CN_INVALID error is, why it pops up, and, most importantly, how to fix or resolve it.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/certera.com\/buy-ssl-certificates\"><img decoding=\"async\" width=\"960\" height=\"150\" sizes=\"(max-width: 960px) 100vw, 960px\" src=\"https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/05\/cheap-ssl-certificates-cta-jpg.webp\" alt=\"Cheap SSL Certificates\" class=\"wp-image-2029\" srcset=\"https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/05\/cheap-ssl-certificates-cta-jpg.webp 960w, https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/05\/cheap-ssl-certificates-cta-300x47.webp 300w, https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/05\/cheap-ssl-certificates-cta-768x120.webp 768w\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What is DLG_FLAGS_SEC_CERT_CN_INVALID Error?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The DLG_FLAGS_SEC_CERT_CN_INVALID error is an SSL certificate-related issue. It appears when the <a href=\"https:\/\/certera.com\/blog\/what-is-a-common-name-cn-in-an-ssl-certificate\/\">common name (CN)<\/a> listed on the SSL cert does not match the domain name the user is attempting to access.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because of this mismatch, a secure connection between the web browser and the website is not established, which leads to the appearance of this warning message.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Reasons for DLG FLAGS SEC CERT CN INVALID Error<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The main reason you see the DLG_FLAGS_SEC_CERT_CN_INVALID warning message is a simple mismatch between the common and domain names.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Apart from this, the error message can also pop up because of &#8220;n&#8221; number of reasons, such as:<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Use of an Invalid or Expired SSL Certificate&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">It also appear if the SSL certificate presented by the website has <a href=\"https:\/\/certera.com\/blog\/what-happens-when-ssl-certificate-expires\/\">expired<\/a> or is considered invalid by the browser.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Wrongly Set Up SSL Cert&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This error may arise if the SSL certificate installed on the web server lacks a <a href=\"https:\/\/certera.com\/blog\/what-is-a-san-ssl-subject-alternative-name-certificate-guide\/\">subject alternative name (SAN)<\/a> or common name matching the accessed domain.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em>For example, <\/em><\/strong>if the SSL cert is issued for &#8220;ssl_error.local.domain,&#8221; but the end user tries to connect to the website using &#8220;ssl_error\/,&#8221; the mismatch triggers the error in question.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Incomplete Chain of Trust<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The DLG_FLAGS_SEC_CERT_CN_INVALID warning message may also pop up when the web server lacks all required intermediate certificates to establish the <a href=\"https:\/\/certera.com\/blog\/what-is-a-ca-certificate-authority-role-pki-trust-hierarchies\/\">chain of trust<\/a>.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Multiple Ways to Fix DLG_FLAGS_SEC_CERT_CN_INVALID Error<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">You can try the methods below to fix it.&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Empty the Browser&#8217;s Cache<\/li>\n\n\n\n<li>Adjust the System&#8217;s Date &amp; Time.<\/li>\n\n\n\n<li>Install Missing Intermediate SSL Certificates<\/li>\n\n\n\n<li>Employ Another SSL Cert<\/li>\n\n\n\n<li>Turn off the &#8220;Certificate address mismatch&#8221; option.<\/li>\n\n\n\n<li>Reset the Web Browser<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Let&#8217;s explore each method in depth.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Method 1: Empty the Browser&#8217;s Cache<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">First of all, if you are experiencing the DLG_FLAGS_SEC_CERT_CN_INVALID error, clear the browser&#8217;s cache. Doing so will remove outdated or corrupted data and conflicting SSL certs that may interfere with a secure connection and cause the issue.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Follow the steps mentioned below to clear or empty the browser&#8217;s cache:&nbsp;<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open a fresh tab in&nbsp;<strong>Chrome<\/strong>.<\/li>\n\n\n\n<li>Click on&nbsp;<strong>Customize and control Google Chrome<\/strong>&nbsp;icon (three vertical dots).<\/li>\n\n\n\n<li>From the list, select&nbsp;<strong>More Tools<\/strong>, and click&nbsp;<strong>Clear browsing data<\/strong>.<\/li>\n\n\n\n<li>Select the&nbsp;<strong>Time range<\/strong>&nbsp;from the list in the&nbsp;<strong>Clear browsing data<\/strong>&nbsp;dialog box.<\/li>\n\n\n\n<li>Check the checkbox before the&nbsp;<strong>Browsing history<\/strong>&nbsp;option.<\/li>\n\n\n\n<li>Check the checkbox in front of the<strong>&nbsp;Cookies and other site data<\/strong>&nbsp;option.<\/li>\n\n\n\n<li>Check the checkbox in front of the&nbsp;<strong>Cached images and files<\/strong>&nbsp;option.<\/li>\n\n\n\n<li>Click&nbsp;<strong>Clear data<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Method 2: Adjust the System&#8217;s Date &amp; Time<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Incorrect system date and time settings can cause SSL cert validation issues, which in turn can lead to the DLG_FLAGS_SEC_CERT_CN_INVALID error.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Follow the steps mentioned below to adjust the system&#8217;s date &amp; time:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Click on the&nbsp;<strong>Search&nbsp;<\/strong>button.<\/li>\n\n\n\n<li>Type&nbsp;<strong>Set the time zone automatically<\/strong>&nbsp;and press&nbsp;<strong>Enter<\/strong>.<\/li>\n\n\n\n<li>The&nbsp;<strong>Settings&nbsp;<\/strong>window will appear.<\/li>\n\n\n\n<li>In the Settings window, in the right pane, click&nbsp;<strong>on&nbsp;<\/strong>the&nbsp;<strong>toggle button<\/strong>&nbsp;placed on the right of the&nbsp;<strong>Set time automatically<\/strong>&nbsp;option.<\/li>\n\n\n\n<li>Click&nbsp;<strong>on&nbsp;<\/strong>the&nbsp;<strong>toggle button<\/strong>&nbsp;placed on the right of the&nbsp;<strong>Set time zone automatically<\/strong>&nbsp;option.<\/li>\n\n\n\n<li><strong>Refresh&nbsp;<\/strong>the web page.<\/li>\n\n\n\n<li>Verify whether the issue persists.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Method 3: Install Missing Intermediate SSL Certificates<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The DLG_FLAGS_SEC_CERT_CN_INVALID error can also pop up because of missing intermediate or root certificates necessary for establishing the chain of trust (a secure connection). So, manually install the missing SSL certs.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Follow the steps mentioned below to install missing SSL certs:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Click&nbsp;<strong>Continue to this website (not recommended)<\/strong>, which is placed on the page displaying the DLG_FLAGS_SEC_CERT_CN_INVALID warning message.<\/li>\n\n\n\n<li>Click&nbsp;<strong>Certificate Error<\/strong>, which is placed adjacent to the red&nbsp;<strong>Address Bar.<\/strong><\/li>\n\n\n\n<li>The&nbsp;<strong>Information&nbsp;<\/strong>window will appear.<\/li>\n\n\n\n<li>On the information window, click&nbsp;<strong>View Certificates<\/strong>.<\/li>\n\n\n\n<li>Select&nbsp;<strong>Install Certificate<\/strong>.<\/li>\n\n\n\n<li>Follow the instructions displayed on the screen.<\/li>\n\n\n\n<li>In the dialog box, click&nbsp;<strong>Yes<\/strong>.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Method 4: Employ Another SSL Cert<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If you find the existing SSL cert is causing, you must <a href=\"https:\/\/certera.com\/buy-ssl-certificates\">renew a new SSL cert<\/a> from trusted certificate authorities. You can choose any one of these globally trusted CAs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To obtain an SSL cert from any CA, you must first <a href=\"https:\/\/certera.com\/ssl-tools\/csr-generator\">generate a certificate signing request<\/a> and submit it to the issuing authority for authentication.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once all the details mentioned in the CSR are verified or authenticated, a new SSL cert is issued. After receiving the SSL cert, install it on the server. Once the installation is successful, verify whether the issue persists.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Method 5: Turn Off the Certificate Address Mismatch Option<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A few modern browsers have a built-in option to check for certificate address mismatches. If you turn this option off, you can bypass the &#8211; DLG_FLAGS_SEC_CERT_CN_INVALID error. But turning this feature off can also introduce security risks; hence &#8211; perform this method carefully.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Follow the steps mentioned below to turn off the warn about the certificate address mismatch option:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Click on the&nbsp;<strong>Search&nbsp;<\/strong>button placed on the taskbar.<\/li>\n\n\n\n<li>Type&nbsp;<strong>Internet Options&nbsp;<\/strong>and press&nbsp;<strong>Enter.&nbsp;<\/strong><\/li>\n\n\n\n<li>The&nbsp;<strong>Internet Properties&nbsp;<\/strong>window will appear.<\/li>\n\n\n\n<li>In the&nbsp;<strong>Internet Properties&nbsp;<\/strong>window, click the&nbsp;<strong>Advanced&nbsp;<\/strong>tab.&nbsp;<\/li>\n\n\n\n<li>Under the&nbsp;<strong>Security&nbsp;<\/strong>section, uncheck the checkbox placed in front of the&nbsp;<strong>Warn about certificate address mismatch&nbsp;<\/strong>option.<\/li>\n\n\n\n<li>Clip&nbsp;<strong>Apply<\/strong>.<\/li>\n\n\n\n<li>Click&nbsp;<strong>OK<\/strong>.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Method 6: Reset the Web Browser<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">As a last resort, reset the web browser to its default settings and verify whether the error persists. Resetting the browser will clear any browser-specific configuration, extensions, or settings that may be causing this error.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Follow the steps mentioned below to reset the browser:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open a <strong>fresh tab in the browser<\/strong> (Google Chrome).<\/li>\n\n\n\n<li>Click on the three vertical dots (<strong>Customize and control Google Chrome<\/strong>).<\/li>\n\n\n\n<li>From the list, select&nbsp;<strong>Settings<\/strong>.<\/li>\n\n\n\n<li>The&nbsp;<strong>Settings&nbsp;<\/strong>window will appear.<\/li>\n\n\n\n<li>In the&nbsp;<strong>Settings&nbsp;<\/strong>window, click&nbsp;<strong>Reset settings<\/strong>.&nbsp;<\/li>\n\n\n\n<li>Click&nbsp;<strong>Restore settings<\/strong>&nbsp;<strong>to their original defaults<\/strong>.<\/li>\n\n\n\n<li>Click&nbsp;<strong>Reset settings<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The DLG_FLAGS_SEC_CERT_CN_INVALID error arises mainly due to a mismatch between the listed common and accessed domain names. However, several other factors can also cause it, such as an expired SSL cert, an incomplete chain of trust, and so on.&nbsp; <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To fix this error, users can try various methods, such as emptying the browser&#8217;s cache, adjusting the system&#8217;s date and time, installing missing intermediate SSL certs, using another SSL cert, turning off the certificate address mismatch option, and ultimately resetting the web browser.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Have you encountered the DLG_FLAGS_SEC_CERT_CN_INVALID error while accessing a site using Chrome, Firefox, or Microsoft Edge browsers? If affirmative, you must understand how frustrating and troublesome it can be. So, to aid in fixing the error, in this article, we will explain what exactly the DLG_FLAGS_SEC_CERT_CN_INVALID error is, why it pops up, and, most importantly,<span class=\"morelink d-block mt-3\"><a href=\"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/\">Read More<\/a><\/span><\/p>\n","protected":false},"author":5,"featured_media":1987,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[342],"class_list":["post-1985","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ssl-errors","tag-dlg_flags_sec_cert_cn_invalid-error","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Fix DLG_FLAGS_SEC_CERT_CN_INVALID Error?<\/title>\n<meta name=\"description\" content=\"When there is a mismatch between the CN field of the certificate presented and the domain name you are using. Here is how to fix DLG_FLAGS_SEC_CERT_CN_INVALID Error.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Fix DLG_FLAGS_SEC_CERT_CN_INVALID Error?\" \/>\n<meta property=\"og:description\" content=\"When there is a mismatch between the CN field of the certificate presented and the domain name you are using. Here is how to fix DLG_FLAGS_SEC_CERT_CN_INVALID Error.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/\" \/>\n<meta property=\"og:site_name\" content=\"Knowledge Base - Certera.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/certeraLLC\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-04-11T11:49:22+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-18T07:37:41+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/04\/dlg-flags-sec-cert-cn-invalid-jpg.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"960\" \/>\n\t<meta property=\"og:image:height\" content=\"620\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Monika\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@certera_llc\" \/>\n<meta name=\"twitter:site\" content=\"@certera_llc\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Monika\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\\\/\"},\"author\":{\"name\":\"Monika\",\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/#\\\/schema\\\/person\\\/44f5e8115383ba05008d1ef58bcfb8cd\"},\"headline\":\"How Resolve DLG_FLAGS_SEC_CERT_CN_INVALID Error?\",\"datePublished\":\"2024-04-11T11:49:22+00:00\",\"dateModified\":\"2026-02-18T07:37:41+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\\\/\"},\"wordCount\":1252,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/certera.com\\\/kb\\\/wp-content\\\/uploads\\\/2024\\\/04\\\/dlg-flags-sec-cert-cn-invalid-jpg.webp\",\"keywords\":[\"DLG_FLAGS_SEC_CERT_CN_INVALID Error\"],\"articleSection\":[\"Fix SSL Errors\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/certera.com\\\/kb\\\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\\\/\",\"url\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\\\/\",\"name\":\"How to Fix DLG_FLAGS_SEC_CERT_CN_INVALID Error?\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/certera.com\\\/kb\\\/wp-content\\\/uploads\\\/2024\\\/04\\\/dlg-flags-sec-cert-cn-invalid-jpg.webp\",\"datePublished\":\"2024-04-11T11:49:22+00:00\",\"dateModified\":\"2026-02-18T07:37:41+00:00\",\"description\":\"When there is a mismatch between the CN field of the certificate presented and the domain name you are using. Here is how to fix DLG_FLAGS_SEC_CERT_CN_INVALID Error.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/certera.com\\\/kb\\\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\\\/#primaryimage\",\"url\":\"https:\\\/\\\/certera.com\\\/kb\\\/wp-content\\\/uploads\\\/2024\\\/04\\\/dlg-flags-sec-cert-cn-invalid-jpg.webp\",\"contentUrl\":\"https:\\\/\\\/certera.com\\\/kb\\\/wp-content\\\/uploads\\\/2024\\\/04\\\/dlg-flags-sec-cert-cn-invalid-jpg.webp\",\"width\":960,\"height\":620,\"caption\":\"Fix DLG_FLAGS_SEC_CERT_CN_INVALID Error\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/certera.com\\\/kb\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"How Resolve DLG_FLAGS_SEC_CERT_CN_INVALID Error?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/#website\",\"url\":\"https:\\\/\\\/certera.com\\\/kb\\\/\",\"name\":\"Knowledge Base - Certera.com\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/#organization\"},\"alternateName\":\"Certera Knowledgebase\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/certera.com\\\/kb\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/#organization\",\"name\":\"Certera\",\"url\":\"https:\\\/\\\/certera.com\\\/kb\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/certera.com\\\/kb\\\/wp-content\\\/uploads\\\/2023\\\/01\\\/brand-certera.svg\",\"contentUrl\":\"https:\\\/\\\/certera.com\\\/kb\\\/wp-content\\\/uploads\\\/2023\\\/01\\\/brand-certera.svg\",\"caption\":\"Certera\"},\"image\":{\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/certeraLLC\\\/\",\"https:\\\/\\\/x.com\\\/certera_llc\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/certera-llc\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/certera.com\\\/kb\\\/#\\\/schema\\\/person\\\/44f5e8115383ba05008d1ef58bcfb8cd\",\"name\":\"Monika\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/46cb23065da48e260b0cec16b0cb1d65b6e45192060355700c378422f56b6a40?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/46cb23065da48e260b0cec16b0cb1d65b6e45192060355700c378422f56b6a40?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/46cb23065da48e260b0cec16b0cb1d65b6e45192060355700c378422f56b6a40?s=96&d=mm&r=g\",\"caption\":\"Monika\"},\"url\":\"https:\\\/\\\/certera.com\\\/kb\\\/author\\\/monika\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"How to Fix DLG_FLAGS_SEC_CERT_CN_INVALID Error?","description":"When there is a mismatch between the CN field of the certificate presented and the domain name you are using. Here is how to fix DLG_FLAGS_SEC_CERT_CN_INVALID Error.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/","og_locale":"en_US","og_type":"article","og_title":"How to Fix DLG_FLAGS_SEC_CERT_CN_INVALID Error?","og_description":"When there is a mismatch between the CN field of the certificate presented and the domain name you are using. Here is how to fix DLG_FLAGS_SEC_CERT_CN_INVALID Error.","og_url":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/","og_site_name":"Knowledge Base - Certera.com","article_publisher":"https:\/\/www.facebook.com\/certeraLLC\/","article_published_time":"2024-04-11T11:49:22+00:00","article_modified_time":"2026-02-18T07:37:41+00:00","og_image":[{"width":960,"height":620,"url":"https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/04\/dlg-flags-sec-cert-cn-invalid-jpg.webp","type":"image\/jpeg"}],"author":"Monika","twitter_card":"summary_large_image","twitter_creator":"@certera_llc","twitter_site":"@certera_llc","twitter_misc":{"Written by":"Monika","Est. reading time":"6 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/#article","isPartOf":{"@id":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/"},"author":{"name":"Monika","@id":"https:\/\/certera.com\/kb\/#\/schema\/person\/44f5e8115383ba05008d1ef58bcfb8cd"},"headline":"How Resolve DLG_FLAGS_SEC_CERT_CN_INVALID Error?","datePublished":"2024-04-11T11:49:22+00:00","dateModified":"2026-02-18T07:37:41+00:00","mainEntityOfPage":{"@id":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/"},"wordCount":1252,"commentCount":0,"publisher":{"@id":"https:\/\/certera.com\/kb\/#organization"},"image":{"@id":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/#primaryimage"},"thumbnailUrl":"https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/04\/dlg-flags-sec-cert-cn-invalid-jpg.webp","keywords":["DLG_FLAGS_SEC_CERT_CN_INVALID Error"],"articleSection":["Fix SSL Errors"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/","url":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/","name":"How to Fix DLG_FLAGS_SEC_CERT_CN_INVALID Error?","isPartOf":{"@id":"https:\/\/certera.com\/kb\/#website"},"primaryImageOfPage":{"@id":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/#primaryimage"},"image":{"@id":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/#primaryimage"},"thumbnailUrl":"https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/04\/dlg-flags-sec-cert-cn-invalid-jpg.webp","datePublished":"2024-04-11T11:49:22+00:00","dateModified":"2026-02-18T07:37:41+00:00","description":"When there is a mismatch between the CN field of the certificate presented and the domain name you are using. Here is how to fix DLG_FLAGS_SEC_CERT_CN_INVALID Error.","breadcrumb":{"@id":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/#primaryimage","url":"https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/04\/dlg-flags-sec-cert-cn-invalid-jpg.webp","contentUrl":"https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/04\/dlg-flags-sec-cert-cn-invalid-jpg.webp","width":960,"height":620,"caption":"Fix DLG_FLAGS_SEC_CERT_CN_INVALID Error"},{"@type":"BreadcrumbList","@id":"https:\/\/certera.com\/kb\/how-resolve-fix-the-dlg-flags-sec-cert-cn-invalid-error\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/certera.com\/kb\/"},{"@type":"ListItem","position":2,"name":"How Resolve DLG_FLAGS_SEC_CERT_CN_INVALID Error?"}]},{"@type":"WebSite","@id":"https:\/\/certera.com\/kb\/#website","url":"https:\/\/certera.com\/kb\/","name":"Knowledge Base - Certera.com","description":"","publisher":{"@id":"https:\/\/certera.com\/kb\/#organization"},"alternateName":"Certera Knowledgebase","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/certera.com\/kb\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/certera.com\/kb\/#organization","name":"Certera","url":"https:\/\/certera.com\/kb\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/certera.com\/kb\/#\/schema\/logo\/image\/","url":"https:\/\/certera.com\/kb\/wp-content\/uploads\/2023\/01\/brand-certera.svg","contentUrl":"https:\/\/certera.com\/kb\/wp-content\/uploads\/2023\/01\/brand-certera.svg","caption":"Certera"},"image":{"@id":"https:\/\/certera.com\/kb\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/certeraLLC\/","https:\/\/x.com\/certera_llc","https:\/\/www.linkedin.com\/company\/certera-llc\/"]},{"@type":"Person","@id":"https:\/\/certera.com\/kb\/#\/schema\/person\/44f5e8115383ba05008d1ef58bcfb8cd","name":"Monika","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/46cb23065da48e260b0cec16b0cb1d65b6e45192060355700c378422f56b6a40?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/46cb23065da48e260b0cec16b0cb1d65b6e45192060355700c378422f56b6a40?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/46cb23065da48e260b0cec16b0cb1d65b6e45192060355700c378422f56b6a40?s=96&d=mm&r=g","caption":"Monika"},"url":"https:\/\/certera.com\/kb\/author\/monika\/"}]}},"_links":{"self":[{"href":"https:\/\/certera.com\/kb\/wp-json\/wp\/v2\/posts\/1985","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/certera.com\/kb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/certera.com\/kb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/certera.com\/kb\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/certera.com\/kb\/wp-json\/wp\/v2\/comments?post=1985"}],"version-history":[{"count":8,"href":"https:\/\/certera.com\/kb\/wp-json\/wp\/v2\/posts\/1985\/revisions"}],"predecessor-version":[{"id":3127,"href":"https:\/\/certera.com\/kb\/wp-json\/wp\/v2\/posts\/1985\/revisions\/3127"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/certera.com\/kb\/wp-json\/wp\/v2\/media\/1987"}],"wp:attachment":[{"href":"https:\/\/certera.com\/kb\/wp-json\/wp\/v2\/media?parent=1985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/certera.com\/kb\/wp-json\/wp\/v2\/categories?post=1985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/certera.com\/kb\/wp-json\/wp\/v2\/tags?post=1985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}