XF 2.2 Attachments Not Working



I had a forum member inform me that the attachments option wasn't working on my forums, www.referralindexforum.com. I have also attempted to attach an image using the "Attach files" option but I get the same problem.

Here's a screenshot of what I see,

It will show the loading bar, and it'll work all the way through, then it just shows a blank black image with no way to insert or attach the image to the post being created.

You can copy an image and paste and it works fine, but using the Attach files option will not work for some reason.

Any pointers?