Fatal error: Uncaught Error: Interface "Lcobucci\JWT\Validation\Constraint" not found in I:\www\oauth2\auth_server\vendor\lcobucci\jwt\src\Validation\Constraint\ValidAt.php:12 Stack trace: #0 {main} thrown in I:\www\oauth2\auth_server\vendor\lcobucci\jwt\src\Validation\Constraint\ValidAt.php on line 12