Fatal error: Uncaught Error: Class 'think\Env' not found in D:\wwwroot\www.jiulongxcl.com\thinkphp\library\think\Response.php:97 Stack trace: #0 D:\wwwroot\www.jiulongxcl.com\thinkphp\library\think\Error.php(52): think\Response->send() #1 D:\wwwroot\www.jiulongxcl.com\thinkphp\library\think\Error.php(88): think\Error::appException(Object(think\exception\ErrorException)) #2 [internal function]: think\Error::appShutdown() #3 {main} thrown in D:\wwwroot\www.jiulongxcl.com\thinkphp\library\think\Response.php on line 97