I had the same problem, I bought a new Chime Pro 2 on Amazon and it got to the step to connect to Wi-Fi it would say it could not connect. But I kept trying the "same" network I used for my Ring Video Door bell. After resetting completely - 30 FULL seconds - I did the setup again. This time I did not use the same network as previous. I then selected the network I wanted to use which "was the same network" but this time I could put in a password.
After that the setup worked like a charm and my Chime Pro 2 is now working.
Key - Do not select the same network - act like it is a different network but then select the same network. Seems to resolve the problem.
Just a final follow-up here...I gave up and returned the Chime Pro Gen 2. I ordered a Gen 1 model, took it out of the box and within 5 minutes it was setup and working perfectly. There must be something wrong with the Gen 2 models. Thanks for everyone's responses.