{"id":600,"date":"2025-12-26T08:23:36","date_gmt":"2025-12-26T07:23:36","guid":{"rendered":"https:\/\/mybox.com\/help\/?post_type=manual_kb&#038;p=600"},"modified":"2026-06-03T09:46:21","modified_gmt":"2026-06-03T07:46:21","slug":"how-to-fix-neterr_cert_authority_invalid-error","status":"publish","type":"manual_kb","link":"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/","title":{"rendered":"How to fix NET::ERR_CERT_AUTHORITY_INVALID error"},"content":{"rendered":"\n<div class=\"translation-block translation-block-merged\">\n<p class=\"wp-block-paragraph\">If you receive the following error when visiting a website:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>NET::ERR_CERT_AUTHORITY_INVALID<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">it means that your browser does not trust the SSL certificate presented by the website.<\/p>\n\n\n\n<\/div>\n\n<div id=\"mybox-1159971196\" class=\"mybox-content mybox-entity-placement\"><div class=\"early-access-banner-inpost\">\r\n  <div class=\"banner-left-inpost\">\r\n    <div class=\"icon-box-inpost\">\r\n      <img decoding=\"async\" src=\"https:\/\/mybox.com\/help\/wp-content\/uploads\/2026\/02\/square-info-icon.svg\" alt=\"Info\">\r\n    <\/div>\r\n    <div class=\"text-box-inpost\">\r\n      <span class=\"label-inpost\"><span class=\"translation-block translation-block-banner-text\">Early access<\/span><\/span>\r\n      <h4><span class=\"translation-block translation-block-banner-text\">Still need help?<\/span><\/h4>\r\n      <p><span class=\"translation-block translation-block-banner-text\">Contact our customer service team.<\/span><\/p>\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <div class=\"banner-right-inpost\">\r\n    <a href=\"https:\/\/panel.mybox.com\/helpdesk2\/v\/list\/\" class=\"banner-button-inpost\"><span class=\"translation-block translation-block-banner-text\">Message us<\/span><\/a>\r\n  <\/div>\r\n<\/div><\/div>\n\n<div class=\"translation-block translation-block-merged\"><p class=\"wp-block-paragraph\">This error indicates that the certificate authority (CA) that issued the certificate could not be verified, causing the browser to warn that the connection may not be secure.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Common_Causes\" >Common Causes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Self-Signed_Certificate\" >Self-Signed Certificate<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Expired_SSL_Certificate\" >Expired SSL Certificate<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Invalid_Certificate_Chain\" >Invalid Certificate Chain<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Untrusted_Certificate_Authority\" >Untrusted Certificate Authority<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Incorrect_Server_Configuration\" >Incorrect Server Configuration<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#How_to_Troubleshoot\" >How to Troubleshoot<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Check_the_Website_Date_and_Time\" >Check the Website Date and Time<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Test_the_Website_in_Another_Browser\" >Test the Website in Another Browser<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Clear_SSL_Cache\" >Clear SSL Cache<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Verify_the_SSL_Certificate\" >Verify the SSL Certificate<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#If_You_Manage_the_Website\" >If You Manage the Website<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Verify_the_Certificate_Installation\" >Verify the Certificate Installation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Renew_the_Certificate\" >Renew the Certificate<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Replace_Self-Signed_Certificates\" >Replace Self-Signed Certificates<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Websites_Hosted_on_mybox\" >Websites Hosted on mybox<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/mybox.com\/help\/en\/knowledgebase\/how-to-fix-neterr_cert_authority_invalid-error\/#Summary\" >Summary<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Causes\"><\/span>Common Causes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Self-Signed_Certificate\"><\/span>Self-Signed Certificate<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">One of the most common causes is the use of a self-signed SSL certificate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A self-signed certificate is generated locally by the server administrator and is not issued by a trusted certificate authority.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because browsers cannot verify its authenticity, they display a warning.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Expired_SSL_Certificate\"><\/span>Expired SSL Certificate<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If the SSL certificate has expired, browsers may reject it and display certificate-related errors.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Invalid_Certificate_Chain\"><\/span>Invalid Certificate Chain<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The certificate may be valid, but the server may be missing one or more intermediate certificates required to establish trust.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Untrusted_Certificate_Authority\"><\/span>Untrusted Certificate Authority<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In rare cases, the certificate authority itself may no longer be trusted by modern browsers or operating systems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Incorrect_Server_Configuration\"><\/span>Incorrect Server Configuration<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">SSL\/TLS misconfiguration can result in browsers being unable to validate the certificate properly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Troubleshoot\"><\/span>How to Troubleshoot<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Check_the_Website_Date_and_Time\"><\/span>Check the Website Date and Time<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Before assuming the problem is with the website, verify that your computer&#8217;s:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Date<\/li>\n\n\n\n<li>Time<\/li>\n\n\n\n<li>Time zone<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">are configured correctly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">An incorrect system clock can trigger certificate validation errors.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Test_the_Website_in_Another_Browser\"><\/span>Test the Website in Another Browser<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Open the website using a different browser to determine whether the issue is browser-specific.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Clear_SSL_Cache\"><\/span>Clear SSL Cache<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">On Windows:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Open:<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>Internet Options<\/code><\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>Go to:<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>Content<\/code><\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>Click:<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>Clear SSL State<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Verify_the_SSL_Certificate\"><\/span>Verify the SSL Certificate<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Check:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Certificate expiration date<\/li>\n\n\n\n<li>Issuing authority<\/li>\n\n\n\n<li>Domain name listed in the certificate<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">You can usually view these details by clicking the padlock icon (if available) in the browser address bar.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"If_You_Manage_the_Website\"><\/span>If You Manage the Website<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Verify_the_Certificate_Installation\"><\/span>Verify the Certificate Installation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ensure that:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The certificate is valid.<\/li>\n\n\n\n<li>Intermediate certificates are installed correctly.<\/li>\n\n\n\n<li>The certificate matches the domain name.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Renew_the_Certificate\"><\/span>Renew the Certificate<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If the certificate has expired, renew it and reinstall it on the server.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Replace_Self-Signed_Certificates\"><\/span>Replace Self-Signed Certificates<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For public websites, use a certificate issued by a trusted certificate authority such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Let&#8217;s Encrypt<\/li>\n\n\n\n<li>Sectigo<\/li>\n\n\n\n<li>DigiCert<\/li>\n\n\n\n<li>GlobalSign<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">instead of a self-signed certificate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Websites_Hosted_on_mybox\"><\/span>Websites Hosted on mybox<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If the affected website is hosted on mybox and you encounter:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>NET::ERR_CERT_AUTHORITY_INVALID<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">please contact the support team through the 24\/7 Helpdesk.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When submitting your request, include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The website address<\/li>\n\n\n\n<li>A screenshot of the error (if possible)<\/li>\n\n\n\n<li>Information about when the issue first appeared<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This will help speed up diagnosis and resolution.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Summary\"><\/span>Summary<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The error:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>NET::ERR_CERT_AUTHORITY_INVALID<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">means that the browser cannot verify the SSL certificate presented by the website.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common causes include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Self-signed certificates<\/li>\n\n\n\n<li>Expired certificates<\/li>\n\n\n\n<li>Missing intermediate certificates<\/li>\n\n\n\n<li>Certificate authority trust issues<\/li>\n\n\n\n<li>SSL\/TLS configuration problems<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If the website is hosted on mybox and the issue persists, contact support for assistance with certificate verification and configuration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<\/div>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"template":"","format":"standard","manualknowledgebasecat":[11,25],"manual_kb_tag":[372,701,1248,2845,2846,2847,2848,2849,2850,2851],"class_list":["post-600","manual_kb","type-manual_kb","status-publish","format-standard","hentry","manualknowledgebasecat-ssl-certificates","manualknowledgebasecat-hosting","manual_kb_tag-ssl-certificate","manual_kb_tag-dedicated-server","manual_kb_tag-expired-certificate","manual_kb_tag-certificate-error","manual_kb_tag-certificate-issuer-not-recognized","manual_kb_tag-untrusted-certificate","manual_kb_tag-self-signed-certificate","manual_kb_tag-local-certificate","manual_kb_tag-tls-error","manual_kb_tag-browser-certificate-warning"],"_links":{"self":[{"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb\/600","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb"}],"about":[{"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/types\/manual_kb"}],"author":[{"embeddable":true,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":1,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb\/600\/revisions"}],"predecessor-version":[{"id":9735,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb\/600\/revisions\/9735"}],"wp:attachment":[{"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/media?parent=600"}],"wp:term":[{"taxonomy":"manualknowledgebasecat","embeddable":true,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manualknowledgebasecat?post=600"},{"taxonomy":"manual_kb_tag","embeddable":true,"href":"https:\/\/mybox.com\/help\/en\/wp-json\/wp\/v2\/manual_kb_tag?post=600"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}