Error code P1-99

None of my security cameras connect to wifi anymore. Had a power outage last week and lost internet access for that entire week. Once we had connection back, cameras refuse to connect to wifi again. I have 1st gen doorbell, indoor stickup cam, and an outdoor spotlight cam. I've tried resetting every camera, rebooted my router numerous times, even had a cable guy come restore our internet service. No changes to our wifi router names or passwords. Yet cameras keep giving me various error codes like P1-99. They won't even register the wifi names in the Ring app. I manually input everything, and even copy pasted the names and passwords. Yet nothing connects. Invested in multiple wifi boosters, I've spent days trying to resolve this issue, yetI get the same results every time. Only had horrible service with Ring over the years. How do I resolve this issue?