Power off your Chromebook (I did a powerwash of my Chromebook before shutting it down) and Router. I have EERO Pro mesh for my router/network. I disconnected the power wire and ethernet cable from my main EERO router, waited a minute, then plugged them back in. I waited until all my EERO mesh points were back to the white light. Then, I turned my Chromebook on, found my network, input the password, and connected immediately and was able to set up my Chromebook.