See the template here: Welcome to Forum: In-Game Bugs!

You'll need to use it for the bug report to be accepted and moved forward.

As for the issue, as the first thing I would recommend trying out running the built-in file check, if you haven't done so yet. Hopefully that'll be able to fix it up.

As a sidey-note, these reports are closed after they've been reviewed, so if you wish to discuss the issue further, you might want to post under Technical Support instead. :]

Good luck!