My site is run on PHP Nuke, and the log in function works fine... It is also connected to PHPbb yet when I login through its fields I get the returning message...
Not Found
The requested URL /modules/Forums/modules.php was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

YET... When I hit backspace and return to the previous page I am logged in.. :-|

I would like to have a smooth user experience, and I do not know how to fix this.

The issue is at http://www.stateofhumanity.org

Can anyone help?

Check that the file exists. If it doesn't, find out what it is and replace it. If it does, there's a problem somewhere else.

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