Fatal error: Uncaught Error: Class 'think\Service' not found in D:\php\WWW\scakxafxfgc.cccf.net\vendor\topthink\think-multi-app\src\Service.php:15 Stack trace: #0 {main} thrown in D:\php\WWW\scakxafxfgc.cccf.net\vendor\topthink\think-multi-app\src\Service.php on line 15