Fatal error: Uncaught Error: Class "Google\Auth\CredentialsLoader" not found in C:\xampp8\htdocs\Gsheet\vendor\google\auth\src\Credentials\AppIdentityCredentials.php:57 Stack trace: #0 {main} thrown in C:\xampp8\htdocs\Gsheet\vendor\google\auth\src\Credentials\AppIdentityCredentials.php on line 57