Warning: require(C:\phpstudy_pro\WWW\mss\thinkphp\library\think\Loader.php): failed to open stream: No such file or directory in C:\phpstudy_pro\WWW\mss\thinkphp\base.php on line 38

Fatal error: require(): Failed opening required 'C:\phpstudy_pro\WWW\mss\thinkphp\library\think\Loader.php' (include_path='.;C:\php\pear') in C:\phpstudy_pro\WWW\mss\thinkphp\base.php on line 38