I think I found the issue. I believe my theme is causing the problem. I’m using Astra 3.6.5. When I entered troubleshooting and used Twenty Twenty with bbPress and BuddyPress, the group forum topics are opening as expected. I also discovered that the WP Admin Dashboard>Appearance>Customize is broken, too. There is some compatibility issue with the latest BuddyPress with the Astra theme.
I’ve opened a ticket with Astra, but wanted to put my discovery here in case anyone else has a similar issue.