Warning: require(D:\phpstudy_pro\WWW\tp6\public/../vendor/autoload.php): failed to open stream: No such file or directory in D:\phpstudy_pro\WWW\tp6\public\index.php on line 15

Fatal error: require(): Failed opening required 'D:\phpstudy_pro\WWW\tp6\public/../vendor/autoload.php' (include_path='.;C:\php\pear') in D:\phpstudy_pro\WWW\tp6\public\index.php on line 15

求指教，谢谢