This worked for me. I hope it works for you.
How to fix live view not working
First make sure you know your Ring account email and password for future use.
Hi @RingPro5000. Thank you for sharing a solution that worked for you! We also have some troubleshooting steps for Live View here that may help other neighbors with a similar concern.
The reason I posted my solution is because I had already tried all the solutions that Ring suggests.
I reconnected my wifi many times, I rebooted the Ring doorbell three times. I turned off my router, reset it, and powered it on again. I went through pages of Ring troubleshooting hints. None of them worked.
I was at the point of trashing the Ring Pro doorbell and buying the Wyze doorbell. I gave it one last try and cleared the cache and data from my Ring app on my phone. My solution worked.
This is really good to know. I’ll give that a try.
I found recently that unplugging my router, waiting, and replugging it did the trick. I guess I hadn’t waited long enough the last time.