Fatal error: Uncaught Error: Class "Symfony\Component\Debug\ExceptionHandler" not found in C:\Apache24_x64\htdocs\ipad\vendor\symfony\debug\Tests\MockExceptionHandler.php:16 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\ipad\vendor\symfony\debug\Tests\MockExceptionHandler.php on line 16