forum topic are not being created

HELP! I'm trying to create new forum topics. When I first installed the forums it was working. Now when I try to go to a group>forum>add topic, I get a page not found error after I submit the topic.

When I go back to the forum, I will see the title of the topic I was trying to create but if I click on that link the topic says "no topic"

I've deactivated just about all of my plugins to see if something was colliding but that doesn't seem to be it. I've tried deleting the forum plugin and reinstalling, that didn't work either. I've even run the sql file from the forum plugin installation folder.

My website it