I'm not sure what happened, but suddenly I cannot post links in the chatbox anymore, it worked fine 2 days ago and i have not updated anything. I'm using version 2.1 with vBulletin Version 3.7.2. When I attempt to post a link I get the error "AJAX error, please try again. (HTTP status: 403 / Forbidden)".
I tried overwriting all the files for version 2.1 and overwriting the product xml import as well and I have the same issue.
Any ideas?