Fatal error: Uncaught Error: Class 'think\Model' not found in /www/wwwroot/www.city-9game.com/data/weapp/Sample/application/plugins/model/Sample.php:22 Stack trace: #0 {main} thrown in /www/wwwroot/www.city-9game.com/data/weapp/Sample/application/plugins/model/Sample.php on line 22