Fatal error: Uncaught Error: Class 'think\Loader' not found in E:\wwwroot\www.do-idea.org\thinkphp\base.php:59 Stack trace: #0 E:\wwwroot\www.do-idea.org\thinkphp\start.php(25): require() #1 E:\wwwroot\www.do-idea.org\index.php(39): require('E:\\wwwroot\\www....') #2 {main} thrown in E:\wwwroot\www.do-idea.org\thinkphp\base.php on line 59