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WordPress Critical Error on This Website: How to Fix the Critical Error Quickly and Safely

1 Jul 2025 6 min read Tips

If you’re seeing a message like “There has been a critical error on this website,” your WordPress site might be down or inaccessible, which is frustrating and stressful. This guide explains why your WordPress site is experiencing a critical error, what triggers these issues, and exactly how to fix the critical error so your site is back up and running in no time.

Whether you’re a beginner or seasoned developer, this article is worth reading because it offers step-by-step fixes, real solutions for the dreaded WordPress critical error, and preventive tips to avoid critical errors in the future.

What Does “There Has Been a Critical Error on This Website” Mean in WordPress?

The phrase “There has been a critical error on this website” typically means WordPress has encountered a fatal issue and cannot load your site correctly. This message often replaces your website content with a blank screen or a vague error message, alerting you to something that’s seriously broken.

Behind the scenes, WordPress enters a “recovery mode” when such critical errors occur, especially if the WordPress core, a current WordPress plugin, theme has caused the error. You may receive an email from WordPress with the subject line “Your Site is Experiencing a Technical Issue,” directing you to check your site admin email inbox. If your WordPress site is down with this error, don’t panic. The problem is likely fixable with a few steps outlined below.

What Causes the Critical Error in WordPress?

The critical error in WordPress can result from multiple factors, such as:

Faulty plugins or themes
A conflict in PHP version compatibility
Limited PHP memory
Corrupted WordPress files or incomplete updates
Errors introduced in custom code

In most cases, one recently installed or updated plugin or theme may trigger the error. WordPress may not always specify the root cause, but the error message, PHP error logs, or your admin email inbox may contain clues. You can often troubleshoot the error by deactivating plugins, increasing the PHP memory limit, or rolling back a recent change.

How to Troubleshoot the Error Message in WordPress?

To troubleshoot the error, begin by enabling debug mode in WordPress. This allows you to log the actual PHP errors causing the issue.

Add the following line in your wp-config.php file:

php

define('WP_DEBUG', true); define('WP_DEBUG_LOG', true); define('WP_DEBUG_DISPLAY', false);

Then, go to the /wp-content/debug.log file to view details. The log can point to the plugin causing the error, or perhaps indicate a problem with your WordPress theme or PHP memory. By identifying the error log, you can fix the issue more directly without just guessing.

How to Access WordPress Recovery Mode?

When you’re experiencing a critical error, WordPress often sends a link to recovery mode to your admin email inbox. This secure link lets you access your website temporarily even if it’s down.

To do this:

Open your site admin email inbox.
Find the email from WordPress with the subject “Your Site is Experiencing a Technical Issue”.
Click the link to enter WordPress recovery mode.

Inside this mode, you’ll be able to deactivate the plugin or theme that triggered the error.

How to Fix the Critical Error from the WordPress Dashboard?

If you’re able to access your website, go to the WordPress dashboard:

Navigate to Plugins > Installed Plugins.
Deactivate all plugins.
Reactivate them one by one to find which one triggered the error.

You should also check Appearance > Themes and switch to a default WordPress theme like Twenty Twenty-Four to rule out a theme conflict. This process helps you find and fix the issue causing the critical error on this website without touching the code.

Can a Plugin Trigger a Critical Error on Your WordPress Site?

Yes — a poorly-coded or incompatible plugin is one of the most common reasons your WordPress website goes down with a critical error message.

Here’s how to fix it using FTP:

Connect to your WordPress site using an FTP client like FileZilla.
Navigate to /wp-content/plugins/.
Rename each plugin folder (e.g., “elementor” to “elementor-old”) to deactivate it.

This disables all activated plugins on your website. If this restores your website, you’ve confirmed that a plugin caused the error.

How to Fix a Critical Error If You’re Locked Out of Your WordPress Website?

If you’re locked out of your website and can’t get into the WordPress admin area, use FTP or cPanel File Manager.

Steps:

Deactivate plugins or themes using the method above.
Re-upload a fresh copy of WordPress core files.
Ensure your wp-config.php is not corrupted.

You can also check the .htaccess file and reset it if needed. Don’t forget to increase the PHP memory limit if you’re getting out-of-memory errors.

How to Identify and Replace a Corrupted WordPress Theme?

Sometimes your current WordPress theme can become corrupted during an update or due to custom code that prevents WordPress from loading properly.

To fix it:

Access your site via FTP.
Navigate to /wp-content/themes/.
Rename the active theme’s folder to force WordPress to fall back to the default WordPress theme.

Once your site is accessible again, you can reinstall or replace the WordPress theme with a clean version.

Can PHP Configuration Cause a WordPress Critical Error?

Yes, your PHP version and configuration can cause critical errors if not compatible with the version of WordPress or plugins you’re using.

Fix it by:

Ensure your server runs a supported version of PHP (e.g., PHP 8.1 or newer).
Increasing the PHP memory limit in php.ini or .htaccess.
Checking the PHP error log for limits or deprecated functions.

If you’re not comfortable editing server settings, ask your hosting provider to update your PHP version or expand PHP memory to improve performance and fix the critical error.

How to Prevent Critical Errors in WordPress in the Future?

To avoid critical errors in the future, take these steps:

Always back up your WordPress website before updating.
Keep your WordPress core, plugins, and themes updated.
Test major updates in a staging environment first.
Use reliable plugins with good reviews.
Regularly monitor the PHP version compatibility.
Set up error reporting to catch issues early.

You can also set up automatic error logging and monitor changes to prevent unexpected critical error messages.

Conclusion

A critical error in WordPress can be alarming, but it’s a common issue that usually has a straightforward fix. Whether caused by a plugin conflict, corrupted theme, outdated PHP version, or exhausted PHP memory limit, these problems can be identified and resolved through tools like recovery mode, error logs, or FTP access. By deactivating problematic plugins or switching to a default WordPress theme, you can often restore access to your site quickly.

To avoid facing a critical error on this website again, make sure to regularly update your WordPress core, themes, and plugins, and always keep a recent backup of your site. Monitoring server settings, checking for compatibility with your version of PHP, and using trusted extensions will help ensure your WordPress site remains secure, functional, and free from unexpected downtime.