This old thread helped me just now to resolve the same issue with my Eero 5, thanks. My situation was slightly different - the Eero 5 device I was trying to connect had been previously registered to a different AGL account holder. I'd had-reset the device several times and spent several hours before finding this thread, I kept hitting the 'Eero 5 WAN IP Address error' so I thought I'd share the steps that resolved the issue I was experiencing in the hope it may help another in the future: Hard R ...
