FOF: Could not write to your cache directory. Please make your cache directories (cache and administrator/cache under your site's root) writeable to PHP by changing the permissions. Alternatively, ask your host to make sure that they have not disabled the stream_wrapper_register() function in PHP. Moreover, if your host is using the Suhosin patch for PHP ask them to whitelist the fof:// stream wrapper in their server's php.ini file. If you do not understand what this means please contact your host and paste this entire message to them.