Chime Pro won't connect to Wifi

My chime was working fine until it was unplugged a few weeks ago. When plugged back in it continually flashed blue. I restarted the set up by scanning the QR code, holding the side button in for 5 seconds which made the light flash green. I connected to the chime and then selected my Wifi. The chime started connecting and flashing blue again but every time it gets to around 80% connected (which takes a while) the chime light goes red and the set up fails when it reaches the end. I have tried this set up on 2 different phones and an iPad and have restarted the router and removed the chime from my ring account to try again but same result.