HTTP Error 500 after activating W3TC


I am trying to maintain a website which I did not set up myself. The health panel informed me that using a cache plugin was advisable, so I chose W3 Total Cache and installed it. Everything looked OK up to the point when I clicked “Activate”: Since then the only response when calling the website (also the Admin panel) is a blank screen in Firefox, or a “HTTP ERROR 500” message in Chrome.

Following some recommendations on the Internet, I have used FileZilla to rename the plugin and themes directory and use only an elementary .htaccess file, but all to no avail. It would appear that the installation of W3TC changed some very fundamental settings or files, which needs to be reverted.

How could I remove the cache plug-in and re-install it properly?



  • This topic was modified 4 hours, 14 minutes ago by tohm59.

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