MyBB plugin, error related to PHP 5.3.0

I get the following error

Warning [2] require(/users/venise/www/admin/modules/config/inviteonly.php) [function.require]: failed to open stream: No such file or directory - Line: 380 - File: admin/index.php PHP 5.3.0 (Linux)
File Line Function
/admin/index.php 380 errorHandler->error
/admin/index.php 380 require

Fatal error: require() [function.require]: Failed opening required ‘/users/venise/www/admin/modules/config/inviteonly.php’ (include_path=’.’) in /users/venise/www/admin/index.php on line 38

Hope you can help me fix this :wink:.
url it appears to is … inviteonly

Hope one of the staff members can fix this,
Else i will provide the files so the community can help too.