Fatal error: Uncaught Error: Class "Google\Collection" not found in C:\xampp8\htdocs\Gsheet\vendor\google\apiclient-services\src\Pubsub\ListTopicsResponse.php:20 Stack trace: #0 {main} thrown in C:\xampp8\htdocs\Gsheet\vendor\google\apiclient-services\src\Pubsub\ListTopicsResponse.php on line 20