Fatal error: Uncaught Error: Class "Monolog\Handler\StreamHandler" not found in D:\programs\xampp\htdocs\backend-test\vendor\google\cloud-core\src\Logger\AppEngineFlexHandlerV2.php:30 Stack trace: #0 {main} thrown in D:\programs\xampp\htdocs\backend-test\vendor\google\cloud-core\src\Logger\AppEngineFlexHandlerV2.php on line 30