WiFi Problem Completely Baffled

I have a brand new Video Doorbell 3. The model number is 5AT359. When I try to connect it to our WiFi, I end up with white lights blinking on the right side of the ring. I did the usual troubleshooting. I am entering the correct password and tried it right next to the access point. Signal strength is fine. We have numerous Alexa-enabled devices, video games consoles, Smart TVs, laptops, desktops etc. on the network, and they all work fine. The WiFi device is from Xfinity. It is also a modem and carries the brand name of Technicolor. It is only six months old. When I tried to connect the Ring device to the my cell phone's hot spot, it connected fine so the problem is not the door bell, but this is not ideal. Does anyone have any theories as to why it will not connect to our WiFi? Thank you.