{"id":8130,"date":"2026-03-04T12:32:22","date_gmt":"2026-03-04T12:32:22","guid":{"rendered":"https:\/\/www.airsang.com\/?p=8130"},"modified":"2026-03-04T12:33:21","modified_gmt":"2026-03-04T12:33:21","slug":"wordpress-critical-error-causes-and-fixes-3","status":"publish","type":"post","link":"https:\/\/www.airsang.com\/fr\/wordpress-critical-error-causes-and-fixes-3\/","title":{"rendered":"Erreur critique WordPress\u00a0: causes et solutions"},"content":{"rendered":"<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"597\" src=\"https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-45-1024x597.png\" alt=\"Erreur critique WordPress\u00a0: causes et solutions\" class=\"wp-image-8131\" srcset=\"https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-45-1024x597.png 1024w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-45-300x175.png 300w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-45-768x448.png 768w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-45-1536x896.png 1536w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-45-1000x583.png 1000w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-45-1x1.png 1w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-45-10x6.png 10w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-45.png 1800w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>If you manage a <strong><a href=\"https:\/\/www.WordPres.com\" target=\"_blank\" rel=\"noopener\">WordPress<\/a><\/strong> website, you may eventually encounter one of the most frustrating messages in the ecosystem: \u201cThere has been a critical error on this website.\u201d<\/p>\n\n\n\n<p>This issue, commonly referred to as the WordPress critical error, can suddenly prevent your website from loading. Instead of your normal pages, visitors see a blank screen or a simple error notice. For online stores, business websites, or content platforms, this can lead to lost traffic, lost revenue, and a poor user experience.<\/p>\n\n\n\n<p>The good news is that a WordPress critical error is usually fixable. In many cases, the issue is caused by plugin conflicts, theme problems, PHP memory limits, or server configuration errors.<\/p>\n\n\n\n<p>In this guide, we\u2019ll explain what the WordPress critical error is, why it happens, and how to fix it step-by-step. Even if you\u2019re not a developer, understanding these troubleshooting methods will help you quickly restore your website.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Is the WordPress Critical Error?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"576\" src=\"https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-46.png\" alt=\"WordPress Critical Error: Causes and Fixes-What Is the WordPress Critical Error?\" class=\"wp-image-8132\" srcset=\"https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-46.png 768w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-46-300x225.png 300w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-46-16x12.png 16w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-46-1x1.png 1w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-46-10x8.png 10w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<p>The WordPress critical error is a fatal PHP error that prevents WordPress from executing properly. Instead of loading the website normally, WordPress stops running and displays an error message.<\/p>\n\n\n\n<p>Most commonly, users see something like this:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cThere has been a critical error on this website. Please check your site admin email inbox for instructions.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p>This message appears when WordPress detects a severe issue in the code that it cannot safely recover from.<\/p>\n\n\n\n<p>Unlike minor warnings or notices, a WordPress critical error halts the entire site. In many cases, both the frontend and the admin dashboard become inaccessible.<\/p>\n\n\n\n<p>For business websites or eCommerce stores, this type of error can be particularly serious because the site may be offline until the problem is resolved.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Does the WordPress Critical Error Happen?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-47-1024x683.png\" alt=\"WordPress Critical Error: Causes and Fixes-Why Does the WordPress Critical Error Happen?\" class=\"wp-image-8133\" srcset=\"https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-47-1024x683.png 1024w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-47-300x200.png 300w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-47-768x512.png 768w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-47-18x12.png 18w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-47-1000x667.png 1000w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-47-1x1.png 1w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-47-10x7.png 10w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-47.png 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Understanding the causes of the WordPress critical error helps you fix it faster. While there can be many technical triggers, most cases fall into a few common categories.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Plugin Conflicts<\/h3>\n\n\n\n<p>Plugins extend WordPress functionality, but they can also introduce problems.<\/p>\n\n\n\n<p>A WordPress critical error often happens when:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A plugin update introduces incompatible code<\/li>\n\n\n\n<li>Deux plugins sont en conflit.<\/li>\n\n\n\n<li>A plugin uses outdated PHP functions<\/li>\n\n\n\n<li>A plugin is partially installed or corrupted<\/li>\n<\/ul>\n\n\n\n<p>Because plugins interact deeply with WordPress core, even a small coding error can cause a fatal crash.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Theme Issues<\/h3>\n\n\n\n<p>Themes control the visual appearance of your site, but they also contain code.<\/p>\n\n\n\n<p>If a theme includes incompatible PHP code or conflicts with WordPress updates, it may trigger a WordPress critical error.<\/p>\n\n\n\n<p>Common theme-related causes include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Poorly coded custom themes<\/li>\n\n\n\n<li>Outdated theme files<\/li>\n\n\n\n<li>Compatibility problems after WordPress updates<\/li>\n\n\n\n<li>Missing or corrupted template files<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">PHP Version Problems<\/h3>\n\n\n\n<p>WordPress relies heavily on PHP. If your hosting environment runs an incompatible PHP version, certain functions may fail.<\/p>\n\n\n\n<p>Par exemple:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A plugin may require PHP 8.0 while your server runs PHP 7.2<\/li>\n\n\n\n<li>A theme may rely on functions removed in newer PHP versions<\/li>\n<\/ul>\n\n\n\n<p>When this happens, WordPress may display a critical error because it cannot execute the code properly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Memory Limit Exhaustion<\/h3>\n\n\n\n<p>Every website has a memory allocation defined by the server. When WordPress exceeds this limit, scripts fail to execute.<\/p>\n\n\n\n<p>Heavy plugins, large queries, or inefficient code can cause the site to exceed available memory, resulting in a WordPress critical error.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Corrupted Core Files<\/h3>\n\n\n\n<p>Sometimes the issue lies in the WordPress core itself.<\/p>\n\n\n\n<p>This may occur when:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A WordPress update fails<\/li>\n\n\n\n<li>Files are accidentally modified<\/li>\n\n\n\n<li>Malware alters the core installation<\/li>\n<\/ul>\n\n\n\n<p>When essential files are missing or damaged, WordPress cannot run properly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">First Step: Check Your Admin Email<\/h2>\n\n\n\n<p>When a WordPress critical error occurs, WordPress often sends a diagnostic email to the site administrator.<\/p>\n\n\n\n<p>This message may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The plugin responsible for the error<\/li>\n\n\n\n<li>The theme involved<\/li>\n\n\n\n<li>The exact PHP file causing the crash<\/li>\n\n\n\n<li>A temporary recovery link<\/li>\n<\/ul>\n\n\n\n<p>The recovery link allows you to log into the admin dashboard in Recovery Mode, even if the site is broken.<\/p>\n\n\n\n<p>Before trying more advanced fixes, always check the administrator email associated with your WordPress installation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Method 1: Disable All Plugins<\/h2>\n\n\n\n<p>If a plugin conflict caused the WordPress critical error, disabling plugins is usually the fastest fix.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How to Disable Plugins via FTP<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Connect to your website using FTP or your hosting file manager.<\/li>\n\n\n\n<li>Navigate to the folder:<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">\/wp-content\/<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>Locate the folder named:<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">plugins<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li>Rename the folder to something like:<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">plugins-disabled<\/pre>\n\n\n\n<p>By renaming the folder, WordPress automatically deactivates all plugins.<\/p>\n\n\n\n<p>If your website loads normally afterward, you know a plugin caused the WordPress critical error.<\/p>\n\n\n\n<p>You can then restore the folder name and reactivate plugins one by one to find the culprit.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Method 2: Switch to a Default Theme<\/h2>\n\n\n\n<p>If disabling plugins does not fix the issue, the next step is checking the theme.<\/p>\n\n\n\n<p>A problematic theme may cause a WordPress critical error, especially after updates.<\/p>\n\n\n\n<p>To test this:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Access your site via FTP or file manager<\/li>\n\n\n\n<li>Navigate to:<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">\/wp-content\/themes\/<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>Renommez votre dossier de th\u00e8me actif<\/li>\n<\/ol>\n\n\n\n<p>WordPress will automatically switch to a default theme like Twenty Twenty-Four if available.<\/p>\n\n\n\n<p>If the site starts working again, the theme likely caused the critical error.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Method 3: Increase PHP Memory Limit<\/h2>\n\n\n\n<p>Sometimes WordPress simply runs out of memory.<\/p>\n\n\n\n<p>Increasing the memory limit can resolve the WordPress critical error.<\/p>\n\n\n\n<p>Edit the wp-config.php file and add:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">d\u00e9finir(&#039;WP_MEMORY_LIMIT&#039;, &#039;256M&#039;);<\/pre>\n\n\n\n<p>This increases available memory for WordPress processes.<\/p>\n\n\n\n<p>After saving the file, refresh your website to see if the error disappears.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Method 4: Enable WordPress Debug Mode<\/h2>\n\n\n\n<p>Debug mode helps identify the exact cause of the WordPress critical error.<\/p>\n\n\n\n<p>To enable debugging, open wp-config.php and add or modify:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">define('WP_DEBUG', true);<br>define('WP_DEBUG_LOG', true);<br>define('WP_DEBUG_DISPLAY', true);<\/pre>\n\n\n\n<p>This allows WordPress to display detailed error information.<\/p>\n\n\n\n<p>The output may reveal:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The plugin responsible<\/li>\n\n\n\n<li>The file causing the crash<\/li>\n\n\n\n<li>The line number of the error<\/li>\n<\/ul>\n\n\n\n<p>This information makes troubleshooting much easier.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Method 5: Reinstall WordPress Core Files<\/h2>\n\n\n\n<p>If the problem comes from corrupted core files, reinstalling WordPress can solve it.<\/p>\n\n\n\n<p>You can do this without affecting your content.<\/p>\n\n\n\n<p>Mesures:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Download a fresh WordPress package<\/li>\n\n\n\n<li>Extract the files<\/li>\n\n\n\n<li>Upload everything except:<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-preformatted\">wp-content<br>wp-config.php<\/pre>\n\n\n\n<p>This replaces the core system files while keeping your content and settings intact.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Method 6: Check PHP Version Compatibility<\/h2>\n\n\n\n<p>Your hosting environment must support modern PHP versions.<\/p>\n\n\n\n<p>Most WordPress installations work best with:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PHP 8.0<\/li>\n\n\n\n<li>PHP 8.1<\/li>\n\n\n\n<li>PHP 8.2<\/li>\n<\/ul>\n\n\n\n<p>If your hosting provider uses outdated PHP versions, plugins and themes may fail.<\/p>\n\n\n\n<p>You can usually change the PHP version inside your hosting control panel.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Method 7: Restore from Backup<\/h2>\n\n\n\n<p>If troubleshooting becomes complicated, restoring a backup can quickly resolve a WordPress critical error.<\/p>\n\n\n\n<p>Many hosting providers offer automatic backups. You can restore a version of the site before the error occurred.<\/p>\n\n\n\n<p>Backup solutions like:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>server snapshots<\/li>\n\n\n\n<li>backup plugins<\/li>\n\n\n\n<li>hosting restore points<\/li>\n<\/ul>\n\n\n\n<p>can help recover your site in minutes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Preventing WordPress Critical Errors<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"850\" height=\"355\" src=\"https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-48.png\" alt=\"WordPress Critical Error: Causes and Fixes-Preventing WordPress Critical Errors\" class=\"wp-image-8134\" srcset=\"https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-48.png 850w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-48-300x125.png 300w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-48-768x321.png 768w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-48-18x8.png 18w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-48-1x1.png 1w, https:\/\/www.airsang.com\/wp-content\/uploads\/2026\/03\/image-48-10x4.png 10w\" sizes=\"auto, (max-width: 850px) 100vw, 850px\" \/><\/figure>\n\n\n\n<p>While the WordPress critical error can usually be fixed, prevention is always better than repair.<\/p>\n\n\n\n<p>Here are a few best practices:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Keep Plugins Updated<\/h3>\n\n\n\n<p>Outdated plugins are one of the most common causes of fatal errors.<\/p>\n\n\n\n<p>Regular updates ensure compatibility with the latest WordPress versions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Use Reliable Themes<\/h3>\n\n\n\n<p>Choose well-maintained themes with active support and frequent updates.<\/p>\n\n\n\n<p>Poorly coded themes significantly increase the risk of crashes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Maintain Regular Backups<\/h3>\n\n\n\n<p>Backups act as your safety net. If something goes wrong, you can quickly restore your site.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Use Quality Hosting<\/h3>\n\n\n\n<p>Cheap or unstable hosting environments often lead to server conflicts and memory issues.<\/p>\n\n\n\n<p>A reliable hosting provider ensures proper PHP versions, stable memory limits, and consistent performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Test Updates in a Staging Environment<\/h3>\n\n\n\n<p>Before applying major updates, test them on a staging site.<\/p>\n\n\n\n<p>This allows you to detect plugin or theme conflicts before they affect your live website.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Website Stability Matters for Online Businesses<\/h2>\n\n\n\n<p>For content sites, a WordPress critical error is frustrating.<\/p>\n\n\n\n<p>For eCommerce stores or international businesses, it can be far more serious.<\/p>\n\n\n\n<p>Website downtime affects:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>customer trust<\/li>\n\n\n\n<li>search engine rankings<\/li>\n\n\n\n<li>conversion rates<\/li>\n\n\n\n<li>brand credibility<\/li>\n<\/ul>\n\n\n\n<p>Even a few hours of downtime during peak traffic can lead to significant losses.<\/p>\n\n\n\n<p>That\u2019s why many businesses invest in professional website design, performance optimization, and maintenance services to ensure stability.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">R\u00e9flexions finales<\/h2>\n\n\n\n<p>Le <strong><a href=\"https:\/\/www.WordPres.com\" target=\"_blank\" rel=\"noopener\">WordPress<\/a><\/strong> critical error may look intimidating at first, but in most cases it has a clear cause and a practical solution.<\/p>\n\n\n\n<p>By understanding the most common triggers\u2014such as plugin conflicts, theme issues, PHP limitations, or corrupted files\u2014you can systematically troubleshoot and restore your website.<\/p>\n\n\n\n<p>Whether you run a blog, a portfolio site, or an online store, maintaining a stable WordPress environment is essential for long-term success.<\/p>\n\n\n\n<p>For businesses operating internationally, website reliability becomes even more important. A well-designed and professionally structured website not only reduces the risk of technical issues but also improves user experience and conversion performance.<\/p>\n\n\n\n<p>This is exactly where our expertise comes in. At <strong><a href=\"https:\/\/www.airsang.com\/fr\/\">AIRSANG<\/a><\/strong>, we specialize in cross-border eCommerce website design, helping brands build high-performance websites that are visually compelling, user-friendly, and optimized for global audiences.<\/p>\n\n\n\n<p>If your business needs professional support with WordPress or <strong><a href=\"https:\/\/www.shopify.com\/\" target=\"_blank\" rel=\"noopener\">Shopify<\/a><\/strong> website design, our team can help you create a site that is both stable and conversion-focused. Feel free to reach out and explore how we can bring your digital vision to life.<\/p>","protected":false},"excerpt":{"rendered":"<p>If you manage a WordPress website, you may eventually encounter one of the most frustrating messages in the ecosystem: \u201cThere has been a critical error&#8230;<\/p>","protected":false},"author":2,"featured_media":8135,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,20,1],"tags":[],"class_list":["post-8130","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-case-studies","category-industry-insights","category-web-knowledge"],"_links":{"self":[{"href":"https:\/\/www.airsang.com\/fr\/wp-json\/wp\/v2\/posts\/8130","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.airsang.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.airsang.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.airsang.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.airsang.com\/fr\/wp-json\/wp\/v2\/comments?post=8130"}],"version-history":[{"count":1,"href":"https:\/\/www.airsang.com\/fr\/wp-json\/wp\/v2\/posts\/8130\/revisions"}],"predecessor-version":[{"id":8136,"href":"https:\/\/www.airsang.com\/fr\/wp-json\/wp\/v2\/posts\/8130\/revisions\/8136"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.airsang.com\/fr\/wp-json\/wp\/v2\/media\/8135"}],"wp:attachment":[{"href":"https:\/\/www.airsang.com\/fr\/wp-json\/wp\/v2\/media?parent=8130"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.airsang.com\/fr\/wp-json\/wp\/v2\/categories?post=8130"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.airsang.com\/fr\/wp-json\/wp\/v2\/tags?post=8130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}