This week I have moved to Three Broadband from Virgin. I have set up all the other 28 devices in the house no problem. The one that will not change networks is the Ring 2 door bell. I still have virgin for 30 days so tried going back to that and not a problem and it works but when I cut off Virgin in 30 days my Ring 2 would not like my new Three Mobile Broadband provider?
Doorbells as well as most outdoor devices are the most problematic to get working with WiFi.
Try moving, just for a test, a WiFi access point on the other side of the wall from your doorbell and see what happens.
this worked. I moved the router next to it and setup no problem and then moved it back and seems to work. Thanks.