WordPress ‘There Has Been a Critical Error on This Website’

Critical Frequency: Common

Error message: There has been a critical error on this website. Please check your site admin email inbox for instructions.

This error message was introduced in WordPress 5.2 as part of the ‘fatal error protection’ feature. It replaced the blank White Screen of Death with a more user-friendly message and added recovery mode functionality.

When WordPress detects a fatal error, it: (1) shows this message to visitors, (2) sends an email with debugging info and a recovery mode link to the admin, and (3) allows the admin to log in through recovery mode to fix the issue.

Common Causes

PHP fatal error in a plugin or theme (same root cause as WSOD)
Plugin update introduced incompatible code
PHP version upgrade broke an older plugin
Corrupted WordPress core files
Syntax error in functions.php after editing

How to Fix It

Check your email: WordPress sends a recovery mode link to the admin email. Click it to access the dashboard in safe mode
Use recovery mode to deactivate the problematic plugin or switch themes
If no email received: Enable WP_DEBUG in wp-config.php to see the actual error
Via FTP/SSH: Rename the offending plugin folder (the error message in debug.log will tell you which file caused it)
If you edited functions.php: Use FTP to revert your changes or fix the syntax error

Frequently Asked Questions

What does 'critical error on this website' mean?

It means WordPress caught a PHP fatal error but handled it gracefully. Check your admin email for a recovery mode link to fix it.

I didn't receive the recovery mode email. What now?

Check your spam folder. If it's not there, enable WP_DEBUG in wp-config.php via FTP/SSH to see the actual error, then fix it directly.