Fatal error: Uncaught Exception: Class app not found in /www/wwwroot/bjgl.scghwl.cn/thinkphp/library/think/Container.php:41 Stack trace: #0 /www/wwwroot/bjgl.scghwl.cn/thinkphp/library/think/Container.php(22): think\Container->make() #1 /www/wwwroot/bjgl.scghwl.cn/thinkphp/base.php(8): think\Container::get() #2 /www/wwwroot/bjgl.scghwl.cn/thinkphp/start.php(4): require('/www/wwwroot/bj...') #3 /www/wwwroot/bjgl.scghwl.cn/public/index.php(5): require('/www/wwwroot/bj...') #4 {main} thrown in /www/wwwroot/bjgl.scghwl.cn/thinkphp/library/think/Container.php on line 41