Ooops, sorry I forgot to delete this thread. I am surprised how many people replied to this!
We're still troubleshooting an issue with 2FA that just happened to rear its head simultaneously with the launching of our new App. Particularly when someone uses multiple devices. It has caused some problems with logging in, accessing DM's, creating threads, and replying to existing threads. I've got my developer involved and they believe they've isolated the issue and hope to have a fix pushed out tomorrow Wednesday.