Hello @azcats
Thank you for reaching out and I am happy to assist you with this.
The 500 errors are usually logged so you should check the debug.log and see what may caused the problem.
In the meantime, please completely remove and re-install W3 Total Cache:
- Check .htaccess File (make backup)
W3TC will create many directives in .htaccess file to control the caching behavior. Each section will start and end with comments like “#BEGIN W3TC Page Cache core” and “#END W3TC Page Cache core”.
Ensure that no residual entries are left over in your .htaccess file after deleting the plugin.
- Delete wp-content files and folders
- cache folder
- w3tc-config folder
- object-cache.php (if exists)
- advanced-cache.php (if exists)
- db.php (if exists)
- upgrade folder
- delete w3-total-cache folder in wp-content/plugins/ (if exists)
Go to your wp dashboard and re-install W3 Total Cache
Let me know if this helps!
Thanks!