attached is the screen shot
And this one.
What is your MySQL Version?
You can find this information on
1) Forum Dashboard
2) Scroll Down, it's under "Server Information"
For wpForo to function as designed, the MySQL version should be
"MySQL version 5.6 or greater"
More Info on wpForo Server Requirements:
Also, you can and deactivate other plugins and test it one by one, to also test if there are any plugin conflicts that's causing the errors that you are seeing on your forum.
Good luck and God bless you! 🙂
If you don't have important topics and posts in the forum, I recommend drop the _wpforo_topics and _wpforo_posts tables and create them again using the [Solve Database Problems] button.
Also, make sure your MySQL server is 5.6 or higher.