Warning: Undefined property: think\Config::$app in /www/wwwroot/app140.ksdemo.cn/config/wechat.php on line 6

Fatal error: Uncaught Error: Call to a member function getRootPath() on null in /www/wwwroot/app140.ksdemo.cn/config/wechat.php:6 Stack trace: #0 /www/wwwroot/app140.ksdemo.cn/vendor/topthink/framework/src/think/Config.php(92): include() #1 /www/wwwroot/app140.ksdemo.cn/vendor/topthink/framework/src/think/Config.php(73): think\Config->parse() #2 /www/wwwroot/app140.ksdemo.cn/vendor/topthink/framework/src/think/App.php(523): think\Config->load() #3 /www/wwwroot/app140.ksdemo.cn/vendor/topthink/framework/src/think/App.php(449): think\App->load() #4 /www/wwwroot/app140.ksdemo.cn/vendor/topthink/framework/src/think/Http.php(186): think\App->initialize() #5 /www/wwwroot/app140.ksdemo.cn/vendor/topthink/framework/src/think/Http.php(163): think\Http->initialize() #6 /www/wwwroot/app140.ksdemo.cn/vendor/zoujingli/think-library/src/service/RuntimeService.php(234): think\Http->run() #7 /www/wwwroot/app140.ksdemo.cn/vendor/zoujingli/think-library/src/service/SystemService.php(405): think\admin\service\RuntimeService::doWebsiteInit() #8 /www/wwwroot/app140.ksdemo.cn/vendor/zoujingli/think-library/src/service/SystemService.php(374): think\admin\service\SystemService::__callStatic() #9 /www/wwwroot/app140.ksdemo.cn/public/index.php(36): think\admin\service\SystemService->__call() #10 {main} thrown in /www/wwwroot/app140.ksdemo.cn/config/wechat.php on line 6