<\/span><\/h2>\nStart by confirming that W3TC is the cause of the problem. When the plugin is disabled and the 500 error disappears, the diagnosis becomes clear.<\/p>\n
To disable:<\/p>\n
Open wp-config.php and set the caching constant to false:<\/p>\n
define('WP_CACHE', false);<\/code><\/pre>\nNext, rename the plugin folder so WordPress stops loading it:<\/p>\n
\/wp-content\/plugins\/w3-total-cache\n\/wp-content\/plugins\/w3-total-cache-disabled<\/code><\/pre>\nNow load your website in a browser.<\/p>\n
If the site works, the issue is confirmed to be caused by W3 Total Cache.<\/p>\n
Using stable hosting such as Serverfellows.com helps reduce configuration conflicts that lead to these failures.<\/p>\n
<\/span>Step 2: Review the Server Error Logs<\/span><\/h2>\nServer logs show the exact reason for the 500 error. Look inside:<\/p>\n
\/var\/log\/apache2\/error.log\n\/var\/log\/nginx\/error.log\n\/var\/log\/php8.0-fpm.log (or php version active)<\/code><\/pre>\nCommon messages include:<\/p>\n
![\"How](\"\/blog\/wp-content\/uploads\/2025\/11\/How-to-Fix-W3-Total-Cache-500-Internal-Server-Error.png\")
<\/p>\n