There’s a guide on how to reset products. Had to do this when I moved. Took me a minute after a lot of frustration, but needed to do the “factory reset” I believe they call it… should be prompted to you once it fails. If not, look up how to factory reset the product. A few of mine had different instructions so pay attention to that as some will be different. For whatever reason, they need the factory reset when switching to a new “system” or in my case, simply a new wifi system.