Ring Chime will not connect to network

I installed the door bell with no issues. Connected to the network first time and online.The chime bell - that's a different story. I tried it on both the extender- what the bell is connected to, and the router direct. All other devices in the house can connect to eitherI did try to reset the router and all but that makes no difference. The chime will eventually turn red for a period of time and go back to flashing blue.What can I do to make this work?