Diagnosis
The Chime Pro is stuck in setup mode, indicated by the solid white light. It is broadcasting its own Wi-Fi network but is not connecting to your home network.
How to Fix It
First, force a reboot. Hold the reset button on the back for 15 seconds. Release it. Wait for the light to cycle. Then, set it up again in the Ring app. Go to Set Up a Device > Chime Pro. Ensure you are connecting it to your 2.4 GHz Wi-Fi network, not the 5 GHz band. Place it within 15-20 feet of your router for initial setup.
If That Didn't Work
The issue is likely a network conflict. In the Ring app, go to the Chime Pro device settings. Tap on Network > Change Network. Select your 2.4 GHz network again and re-enter the password. This forces a fresh network handshake.
Heads Up
The Chime Pro cannot extend a 5 GHz signal. If your router broadcasts a single network name for both bands, you may need to temporarily disable the 5 GHz band in your router settings to complete the initial setup.