{"id":9365,"date":"2024-12-25T10:34:33","date_gmt":"2024-12-25T10:34:33","guid":{"rendered":"https:\/\/outbyte.com\/blog\/?p=9365"},"modified":"2025-11-20T08:51:06","modified_gmt":"2025-11-20T08:51:06","slug":"how-to-fix-err_http2_protocol_error","status":"publish","type":"post","link":"https:\/\/outbyte.com\/blog\/how-to-fix-err_http2_protocol_error\/","title":{"rendered":"How to Fix ERR_HTTP2_PROTOCOL_ERROR?"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_ERR_HTTP2_PROTOCOL_ERROR\"><\/span>What is ERR_HTTP2_PROTOCOL_ERROR?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The err_http2_protocol_error&nbsp;occurs&nbsp;when&nbsp;one&nbsp;user tries&nbsp;visiting&nbsp;any&nbsp;particular&nbsp;website. In some scenarios, the thing&nbsp;happens&nbsp;for&nbsp;few websites;&nbsp;getting&nbsp;rid&nbsp;of that error in these cases requires one to&nbsp;only shift&nbsp;to&nbsp;the&nbsp;alternative&nbsp;browser, however, another scenario has seen popping up such errors on sites&#8217; logs that aren&#8217;t letting any other switch make&nbsp;a&nbsp;change&nbsp;in&nbsp;it. The&nbsp;error of the&nbsp;HTTP2 protocol&nbsp;has been reported on all popular web browsers:&nbsp;Chrome, Firefox, Edge, Opera, etc. It is also&nbsp;reported&nbsp;across devices using different operating systems: Windows, Mac, Linux, iPhone, Android, etc.&nbsp;The error even pops up when using certain application and gaming platforms-like Discord.<br><br>Such&nbsp;kinds&nbsp;of&nbsp;errors&nbsp;may&nbsp;occur&nbsp;either&nbsp;on&nbsp;the client&nbsp;or&nbsp;server side. In this&nbsp;post on <a href=\"https:\/\/outbyte.com\/\">Outbyte<\/a>, we&#8217;re going to learn how to troubleshoot&nbsp;an&nbsp;err_http2_protocol_error&nbsp;error&nbsp;from&nbsp;the client-side.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Does_ERR_HTTP2_PROTOCOL_ERROR_Occur\"><\/span>Why Does ERR_HTTP2_PROTOCOL_ERROR Occur?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>This might be due to older versions of software, interference of browser extensions with web servers, corrupted cookies or cache, and time or date settings on your device. The security protocols in your system also ban some sites, which might be one of the reasons for this error to occur.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>People also ask<\/strong><\/p>\n\n\n\n<p>Read about other popular Browser Errors:<\/p>\n\n\n\n<p><a href=\"https:\/\/outbyte.com\/blog\/how-to-fix-the-err_connection_reset-error\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u201cERR_CONNECTION_RESET\u201d Error<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/outbyte.com\/blog\/how-to-resolve-the-pr_connect_reset_error\/\" target=\"_blank\" rel=\"noreferrer noopener\">PR_Connect_Reset_Error in Firefox<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/outbyte.com\/blog\/how-to-fix-the-ssl_error_rx_record_too_long-error-in-firefox\/\" target=\"_blank\" rel=\"noreferrer noopener\">SSL_ERROR_RX_RECORD_TOO_LONG Error in Firefox <\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/outbyte.com\/blog\/fixing-error-code-224003-on-windows-10-11\/\" target=\"_blank\" rel=\"noreferrer noopener\">Error Code 224003 in browser<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/outbyte.com\/blog\/how-to-fix-err_http2_protocol_error\/\" target=\"_blank\" rel=\"noreferrer noopener\">How to Fix ERR_HTTP2_PROTOCOL_ERROR<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/outbyte.com\/blog\/what-to-do-about-err_connection_refused-error-in-chrome\/\" target=\"_blank\" rel=\"noreferrer noopener\">ERR_CONNECTION_REFUSED Error<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/outbyte.com\/blog\/how-to-fix-status_access_violation\/\" target=\"_blank\" rel=\"noreferrer noopener\">Status_Access_Violation Error<\/a><\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Fixing_ERR_HTTP2_PROTOCOL_ERROR\"><\/span>Fixing ERR_HTTP2_PROTOCOL_ERROR<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Let&#8217;s go through some solutions to fix this error on your device.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Adjusting_Time_and_Date_Settings\"><\/span>1. Adjusting Time and Date Settings<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The incorrect date and time settings can cause this error because web servers may have the ability to refuse connections whose timestamp is not correct.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Right-click the clock icon in the system tray area.<\/li>\n\n\n\n<li>Click on Adjust Date and Time.<\/li>\n\n\n\n<li>Under the option Set Time Automatically, click on the switch and set it to Off.<\/li>\n\n\n\n<li>Now, set the Time Zone correctly and adjust the time and date manually.<\/li>\n\n\n\n<li>Restart your PC. After that, check whether the issue has been sorted out or not.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Updating_Your_Browser\"><\/span>2. Updating Your Browser<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>An outdated browser will not work appropriately with the HTTP2 protocol and hence will cause this error. Updating of your browser will resolve some compatibility issues.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Open Chrome and click on the Menu.<\/li>\n\n\n\n<li>Now go to Help &gt; About Google Chrome.<\/li>\n\n\n\n<li>Check for updates if available, then install it.<\/li>\n\n\n\n<li>Now restart your browser and open the website again.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"434\" src=\"https:\/\/outbyte.com\/blog\/wp-content\/uploads\/get-started-with-chrome-1024x434.webp\" alt=\"err_http2_protocol_error\" class=\"wp-image-9367\" style=\"width:560px;height:auto\" srcset=\"https:\/\/outbyte.com\/blog\/wp-content\/uploads\/get-started-with-chrome-1024x434.webp 1024w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/get-started-with-chrome-300x127.webp 300w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/get-started-with-chrome-768x325.webp 768w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/get-started-with-chrome-1536x651.webp 1536w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/get-started-with-chrome-2048x868.webp 2048w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/get-started-with-chrome-1200x508.webp 1200w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/get-started-with-chrome-1980x839.webp 1980w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Of course, there are some special tools, such as <a href=\"https:\/\/outbyte.com\/software\/pc-repair\/?m=site_blog_article_pcr_pplink&amp;utm_source=outbyte&amp;utm_medium=blog&amp;utm_campaign=article_pcr_pplink&amp;utm_term=Outbyte+PC+Repair&amp;utm_content=\/blog\/how-to-fix-err_http2_protocol_error\/\" target=\"_blank\" rel=\"noreferrer noopener\">Outbyte PC Repair<\/a>, which can help to fix this and other types of errors. Tools in this category enable the detection and subsequent repair of performance issues that may be affecting the functioning of your PC.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Updating_Operating_System\"><\/span>3. Updating Operating System<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Some protocols may not work properly if your OS is out of date. Update the system to the latest version.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Click the Windows icon.<\/li>\n\n\n\n<li>Search for Check for Updates.<\/li>\n\n\n\n<li>In the new window, click the Check for updates.<\/li>\n\n\n\n<li>If the system detects any updates, click on Install and restart your PC.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Using_Incognito_Mode\"><\/span>4. Using Incognito Mode<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>It will disable extensions besides bypassing cookies or cache which may be interfering with the proper working of the protocol.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Launch your browser.<\/li>\n\n\n\n<li>Click the Menu and select New Incognito Window.<\/li>\n\n\n\n<li>Go to the problematic website again.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"290\" src=\"https:\/\/outbyte.com\/blog\/wp-content\/uploads\/enable-chrome-incognito-mode-1-1024x290.webp\" alt=\"err_http2_protocol error\" class=\"wp-image-9373\" srcset=\"https:\/\/outbyte.com\/blog\/wp-content\/uploads\/enable-chrome-incognito-mode-1-1024x290.webp 1024w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/enable-chrome-incognito-mode-1-300x85.webp 300w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/enable-chrome-incognito-mode-1-768x217.webp 768w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/enable-chrome-incognito-mode-1-1536x435.webp 1536w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/enable-chrome-incognito-mode-1-2048x580.webp 2048w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/enable-chrome-incognito-mode-1-1200x340.webp 1200w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/enable-chrome-incognito-mode-1-1980x560.webp 1980w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>If it is working now, then there might be an issue in your extensions or browser data.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Disabling_Conflicting_Extensions\"><\/span>5. Disabling Conflicting Extensions<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Disable Extensions that Conflict Extensions can conflict with websites. Try disabling extensions if it had worked using Incognito Mode.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Open the Chrome browser and click the icon of Extensions, which is located besides the address bar.<\/li>\n\n\n\n<li>Click on <strong>Manage Extensions<\/strong>.<\/li>\n\n\n\n<li>Suspected extensions should have toggles off<\/li>\n\n\n\n<li>Restart your browser and retry the site.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_Resetting_Advanced_Experimental_Settings\"><\/span>6. Resetting Advanced Experimental Settings<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Sometimes modifying advanced browser settings can cause an issue. Reset the settings to default.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Open <strong>Chrome<\/strong> and in the address bar type <code class=\"inline\">chrome:\/\/flags\/<\/code>.<\/li>\n\n\n\n<li>Click on <strong>Reset All<\/strong> in the upper right-hand corner.<\/li>\n\n\n\n<li>Close your browser and re-open it to check if the HTTP2 protocol error has been cleared.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"605\" src=\"https:\/\/outbyte.com\/blog\/wp-content\/uploads\/reset-advanced-experimental-settings-1024x605.webp\" alt=\"error err_http2_protocol_error\" class=\"wp-image-9371\" srcset=\"https:\/\/outbyte.com\/blog\/wp-content\/uploads\/reset-advanced-experimental-settings-1024x605.webp 1024w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/reset-advanced-experimental-settings-300x177.webp 300w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/reset-advanced-experimental-settings-768x454.webp 768w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/reset-advanced-experimental-settings-1536x907.webp 1536w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/reset-advanced-experimental-settings-2048x1210.webp 2048w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/reset-advanced-experimental-settings-1200x709.webp 1200w, https:\/\/outbyte.com\/blog\/wp-content\/uploads\/reset-advanced-experimental-settings-1980x1170.webp 1980w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Switching_to_a_New_Browser_Profile\"><\/span>7. Switching to a New Browser Profile<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Creating a new profile can resolve issues related to corrupted browser settings.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Click your <strong>User Profile<\/strong> icon in the browser.<\/li>\n\n\n\n<li>Choose <strong>Add<\/strong> and proceed without an account.<\/li>\n\n\n\n<li>Name your new profile and see if the issue persists.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"8_Clearing_Cache_Cookies_and_History\"><\/span>8. Clearing Cache, Cookies, and History<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Corrupt cache or cookies can block your connection to certain sites. Clearing them can fix this issue.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Open <strong>Chrome<\/strong>.<\/li>\n\n\n\n<li>Go to <strong>More Tools &gt; Clear Browsing Data<\/strong>.<\/li>\n\n\n\n<li>In the <strong>Advanced<\/strong> tab, select the time range for <strong>All-Time<\/strong> and put a check mark next to every category.<\/li>\n\n\n\n<li>Clear <strong>Cache<\/strong>, <strong>Cookies<\/strong>, and <strong>History<\/strong>. In the address bar, click the padlock icon and choose Cookies. Select a cookie and press the Remove button.<\/li>\n\n\n\n<li>Relaunch the browser and try the website again.<\/li>\n<\/ol>\n\n\n\n<p>For Mac Users:<br>If you&#8217;re using a Mac, you can follow this step-by-step guide to clear browsing data in Safari, Chrome, or other browsers: <a href=\"https:\/\/mackeeper.com\/blog\/how-to-clear-cache-mac\/\" target=\"_blank\" rel=\"noreferrer noopener\">How to Clear Cache on Mac<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>What is the ERR_HTTP2_PROTOCOL_ERROR?<\/strong><\/summary>\n<p>The error shows up when a browser fails to establish a connection via the HTTP2 protocol due to outdated software, extensions, or corrupted cache.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Why does this error show up only on some websites?<\/strong><\/summary>\n<p>Because of incompatibility between your browser or system and certain web servers.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>How can I fix this error ASAP?<\/strong><\/summary>\n<p>You are to clean the cache and cookies in your browser first, then update it.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Can this error be resolved by disabling extensions?<\/strong><\/summary>\n<p>Yes, in case any extension conflicts with the working of any website, then it may resolve the issue.<\/p>\n<\/details>\n","protected":false},"excerpt":{"rendered":"<p>What is ERR_HTTP2_PROTOCOL_ERROR? The err_http2_protocol_error&nbsp;occurs&nbsp;when&nbsp;one&nbsp;user tries&nbsp;visiting&nbsp;any&nbsp;particular&nbsp;website. In some scenarios, the thing&nbsp;happens&nbsp;for&nbsp;few websites;&nbsp;getting&nbsp;rid&nbsp;of that error in these cases requires one to&nbsp;only shift&nbsp;to&nbsp;the&nbsp;alternative&nbsp;browser, however, another scenario has seen popping up such errors on sites&#8217; logs that aren&#8217;t letting any other switch make&nbsp;a&nbsp;change&nbsp;in&nbsp;it. The&nbsp;error of the&nbsp;HTTP2 protocol&nbsp;has been reported on all popular web browsers:&nbsp;Chrome, Firefox, Edge, Opera, etc&#8230;. <a href=\"https:\/\/outbyte.com\/blog\/how-to-fix-err_http2_protocol_error\/\" target=\"_blank\">Read more.<\/a><\/p>\n","protected":false},"author":27,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,11],"tags":[63,67,439],"class_list":["post-9365","post","type-post","status-publish","format-standard","hentry","category-fixes","category-guides","tag-application-error","tag-error-code","tag-stepbystep"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Fix ERR_HTTP2_PROTOCOL_ERROR? - Outbyte Official Blog<\/title>\n<meta name=\"description\" content=\"It can but does not always appear on any browser- let that be Chrome, Firefox, or Edge-on either single or all sites.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/outbyte.com\/blog\/how-to-fix-err_http2_protocol_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 ERR_HTTP2_PROTOCOL_ERROR? 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