Same thing happened to me about the same time (roughly 6:30 Mountain). Same issue with Classic app.
Also, my Yale Zigbee door lock is now reporting as “offline” but I can still manually lock and unlock it via either the Classic or new app.
I was going to go through the pain of unpairing and re-pairing the lock, but since your app blew up too, I think I’ll wait awhile and see if the app and pairing magically fix themselves.
EDIT: Looks like there’s a discussion about this issue here: Issues with Device Control and Hub Connectivity (December 18, 2019)