Fatal error: Uncaught Error: Interface "Lcobucci\JWT\Signer" not found in I:\www\oauth2\auth_server\vendor\lcobucci\jwt\src\Signer\None.php:8 Stack trace: #0 {main} thrown in I:\www\oauth2\auth_server\vendor\lcobucci\jwt\src\Signer\None.php on line 8