Fatal error: Uncaught Error: Class 'think\Loader' not found in /www/wwwroot/dianying/thinkphp/base.php:59 Stack trace: #0 /www/wwwroot/dianying/thinkphp/start.php(16): require() #1 /www/wwwroot/dianying/index.php(49): require('/www/wwwroot/di...') #2 {main} thrown in /www/wwwroot/dianying/thinkphp/base.php on line 59