Fatal error: Uncaught Error: Interface "Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface" not found in /home/standardtelephon/public_html/apps/vendor/symfony/event-dispatcher/DependencyInjection/AddEventAliasesPass.php:22 Stack trace: #0 {main} thrown in /home/standardtelephon/public_html/apps/vendor/symfony/event-dispatcher/DependencyInjection/AddEventAliasesPass.php on line 22