Fatal error: Uncaught Error: Interface 'Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface' not found in C:\xampp\htdocs\admin\vendor\symfony\event-dispatcher\DependencyInjection\AddEventAliasesPass.php:22 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\symfony\event-dispatcher\DependencyInjection\AddEventAliasesPass.php on line 22