Fatal error: Uncaught Error: Class 'Symfony\Component\Debug\Exception\FatalThrowableError' not found in /var/www/webapp/vendor/symfony/symfony/src/Symfony/Component/Debug/ErrorHandler.php:526 Stack trace: #0 [internal function]: Symfony\Component\Debug\ErrorHandler->handleException(Object(Error)) #1 {main} thrown in /var/www/webapp/vendor/symfony/symfony/src/Symfony/Component/Debug/ErrorHandler.php on line 526