if you have a error like
fatal error: bla bla bla

cause the page cache don't find the cache dir upload this file and replace or open pache_cache.php and replace:

$this->cache_dir = DIR_FS_CATALOG . '/cache/';

with this:

$this->cache_dir = DIR_FS_CATALOG . 'cache/';

just a updates not full file here, contain only patch and bug fix below.

orginal credits to the contributor.