Fatal error: Uncaught Error: Class "Symfony\Component\ErrorHandler\ThrowableUtils" not found in /app/vendor/symfony/error-handler/ErrorHandler.php:501 Stack trace: #0 [internal function]: Symfony\Component\ErrorHandler\ErrorHandler->handleException(Object(Error)) #1 {main} thrown in /app/vendor/symfony/error-handler/ErrorHandler.php on line 501