error when accepting a post in a forum that's eligible. (Possible bug?)

So a user posted in my “Food Junkies” forum on my site, it is included as one of the eligible forums, but it IS a subforum, i don’t think that’d matter but, i get an error when trying to approve their post for payment:

The post in question is - Pineapple goes on Pizza | Revillution - Your Portal to Video Game and Content Creation Entertainment | Gaming Forums

Forum it’s posted in - Food Junkies | Revillution - Your Portal to Video Game and Content Creation Entertainment | Gaming Forums

Not sure why it’d be giving me this error, there shouldn’t be an issue, as you can see, the forum is eligible:

Just thought i’d bring this to your attention.