Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DependencyInjection\Extension' not found in /home/Filipie/public_html/mikolgallery/forum/phpBB3/phpbb/extension/di/extension_base.php:25 Stack trace: #0 {main} thrown in /home/Filipie/public_html/mikolgallery/forum/phpBB3/phpbb/extension/di/extension_base.php on line 25