Warning: require(../../mainfile.php): Failed to open stream: No such file or directory in C:\inetpub\wwwroot\modules\sitemap\index.php on line 3

Fatal error: Uncaught Error: Failed opening required '../../mainfile.php' (include_path='.;C:\php\pear') in C:\inetpub\wwwroot\modules\sitemap\index.php:3 Stack trace: #0 {main} thrown in C:\inetpub\wwwroot\modules\sitemap\index.php on line 3