[phpBB Debug] PHP Warning: in file [ROOT]/vendor/composer/ClassLoader.php on line 571: include(): Failed opening '[ROOT]/vendor/composer/../symfony/config/ConfigCache.php' for inclusion (include_path='.:/opt/alt/php82/usr/share/pear:/opt/alt/php82/usr/share/php:/usr/share/pear:/usr/share/php')

Fatal error: Uncaught Error: Class "Symfony\Component\Config\ConfigCache" not found in /home/G/geobergenno/subdomener/forum/phpbb/di/container_builder.php:157 Stack trace: #0 /home/G/geobergenno/subdomener/forum/common.php(127): phpbb\di\container_builder->get_container() #1 /home/G/geobergenno/subdomener/forum/app.php(23): include('/home/G/geoberg...') #2 {main} thrown in /home/G/geobergenno/subdomener/forum/phpbb/di/container_builder.php on line 157