Fatal error: Uncaught Error: Interface 'Google\Auth\FetchAuthTokenInterface' not found in C:\xampp7\htdocs\sigpkl\vendor\google\auth\src\SignBlobInterface.php:23 Stack trace: #0 {main} thrown in C:\xampp7\htdocs\sigpkl\vendor\google\auth\src\SignBlobInterface.php on line 23