Fatal error: Uncaught Error: Class 'Symfony\Component\HttpFoundation\Exception\UnexpectedValueException' not found in C:\xampp\htdocs\plugins\Symfony\Component\HttpFoundation\Exception\ConflictingHeadersException.php:19 Stack trace: #0 {main} thrown in C:\xampp\htdocs\plugins\Symfony\Component\HttpFoundation\Exception\ConflictingHeadersException.php on line 19