Nest doorbell and outdoor camera will no longer connect to WiFi

We lost power a couple weeks ago and the nest doorbell will no longer connect to our WiFi since.  WiFi is fine, everything else is working no problems.  I contacted nest, they sent a new refurbished doorbell and it will not connect.  Keeps saying NC09 error code, firewall and internet error.  Both the old and new doorbell camera will not connect.  Now we have disconnected the outdoor nest camera as per a suggestion to try to connect doorbell first, but now the nest outdoor camera will also not connect to WiFi.  No changes at all with internet on our end, we even tried unplugging and rebooting it, no luck.  I don't know why this will no longer connect.  It has always worked for a few years up until 2 weeks ago.