Found this in log
[18-Oct-2018 14:16:29] WARNING: [pool domain.com] child 413 said into stderr: "NOTICE: PHP message: PHP Warning: Missing argument 1 for ModuleCore::isEnabled(), called in /var/www/vhosts/domain.com/domain.com/classes/Hook.php on line 287 and defined in /var/www/vhosts/domain.com/domain.com/classes/module/Module.php on line 1429"
[18-Oct-2018 14:16:35] WARNING: [pool domain.com] child 413 said into stderr: "NOTICE: PHP message: PHP Fatal error: Cannot declare class PageCache, because the name is already in use in /var/www/vhosts/domain.com/domain.com/modules/pagecache/pagecache.php on line 0"
So I renamed pagecache folder on modules folder and now it works fine.
Thanks, guys for the help. :)