Main forum not working

I am using the BuddyPress Scholar Theme. I have groups setup and we are using the forums in the groups successfully.

When I click on the forum link from the main page of the site, I am taken to what I assume is the main forum (see image). I've tried adding a new topic. It allows me to enter a title, content, and tags. But when I click, "Post Topic", it just disappears. I also notice the "Post in Group Forum" drop down list is unpopulated.

Any suggestions on how to fix this?