Вот такая ошибка на локальном xampp
Warning: fopen(../files/cache/ip_flood.dat): failed to open stream: Permission denied in C:\xampp\htdocs\incfiles\classes\core.php on line 161
Warning: flock() expects parameter 1 to be resource, boolean given in C:\xampp\htdocs\incfiles\classes\core.php on line 162
Cannot flock ANTIFLOOD file.