Fatal error: Uncaught Error: Class "phpbb\install\task_base" not found in /usr/www/lv2az/public/notbomb/youtopia/phpbb/install/module/requirements/task/check_server_environment.php:19 Stack trace: #0 {main} thrown in /usr/www/lv2az/public/notbomb/youtopia/phpbb/install/module/requirements/task/check_server_environment.php on line 19