Fatal error: Uncaught Error: Interface "Lcobucci\JWT\Signer" not found in I:\www\oauth2\auth_server\vendor\lcobucci\jwt\src\Signer\OpenSSL.php:22 Stack trace: #0 {main} thrown in I:\www\oauth2\auth_server\vendor\lcobucci\jwt\src\Signer\OpenSSL.php on line 22