I have the same problem… the upgrade was successfully when I start home assistant I see in TOP that the CPU gives a very high CPU.
I don’t now why this is…
I’am lucky that I create an backup before I did this upgrade…
What I am doing now is upgrading first my python to version 3.7.0 in the hope when I do a new upgrade that it works…
Looks like all my Guest notifications are Gone?
Its just devices on the Known devices that gives a notification when they are connected to my wifi?
Really don’t understand why this should not be working in this new version?
Any input would be greatly appreciated
UPDATE: I found the new UNIFI configurator, it now demands a admin account? (Before I had a special user account with limited access and that was fine!)
After configuring this I still dont have any of my “device_tracker.samsunggalaxys7” back working?
It looks like you took the axe to some core device/entity files and broke the JSON formatting… that’s the only time I’ve seen yellow errors on such a large scale.