You are seeing the error because it was enabled recently to help our engineers narrow down why some users can't load the app. The error means that the hub IP address may have changed and the mobile app can't communicate with the hub.
Same problem New app Notification not working with my iPhone and iPad. I deleted the old version app and reinstall new APP, reset hub. Still not working.
With the old version app all notification worked.
I use IPhone 14 and IPad Pro last iOS
Reinstalled the app 2.0.4 (303) as instructed above. Now, can’t get past the multiple hubs screen. Clicking on the hub doesn’t do anything. Clicking on the offline hub gives an error, of course. Deleted and installed 2.0.3, same problem.