Fatal error: Uncaught Error: Interface 'Laravel\SerializableClosure\Contracts\Signer' not found in C:\Apache24\htdocs\vendor.old\laravel\serializable-closure\src\Signers\Hmac.php:7 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\vendor.old\laravel\serializable-closure\src\Signers\Hmac.php on line 7