An object-cache implementation using the XCache extension.
You will see this error message when either the xcache module is not loaded or the
xcache.var_size directive is not set in your php.ini. If not configured, this setting defaults to 0 which disables the cache.
This error indicates that you likely have two copies of the object cache installed. Make sure you have put the file object-cache.php into your
/wp-content/ directory only. Do not upload it to the
/wp-content/plugins direcotry or any subdirectory like
XCache Object Cache Backend is not a regular WordPress plugin but a
Drop-in. Terefore you cannot store it into the