Likewise having the same problem.
Ring installed today and when I try to update the ring the chimes led flashes green and blue for a couple of seconds and the phone shows Updating settings. After a while the phone shows an error (screenshot attached)
Iphone running IOS 13.6
Ring App 5.29.0
Wifi
4G
Chimes reset and setup up again
App deleted and re-installed
Please sort this out.