Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Exception\HttpException" not found in E:\Ampps\www\CAS\vendor\laravel\framework\src\Illuminate\Routing\Exceptions\InvalidSignatureException.php:0 Stack trace: #0 {main} thrown in E:\Ampps\www\CAS\vendor\laravel\framework\src\Illuminate\Routing\Exceptions\InvalidSignatureException.php on line 0