WordPress Comments Error
I have been using Vanilla to replace the commenting system in my WordPress blog. It has been working fine until recently. Any blog post that had been linked to a discussion in my forum still works normally. The comments are visible and new comments can be added. However, if someone tries to comment on a new blog post that hasn't been linked to a forum discussion, this error appears "There was an error performing your request. Please try again."
This used to work seamlessly so I'm not sure what happened. I'm still using Vanilla 2.1.13p1
Any help on fixing this would be greatly appreciated, thanks!