Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\Tests\AbstractEventDispatcherTest" not found in C:\Apache24_x64\htdocs\vak_old\vendor\symfony\event-dispatcher\Tests\EventDispatcherTest.php:16 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\vak_old\vendor\symfony\event-dispatcher\Tests\EventDispatcherTest.php on line 16