Had to replace my router due to a power surge caused by a lighning strike close by. Spectrum provided me with the Spectrum WiFi 6 Router. All my devices within range are connected and working fine. However, I have a zone where it is difficult to get a connection. Previously, I had purchased the RE650 Range Extender for this area. I cannot get the Range Extender to attach to the new Router. I have tried the mobile Tether app, I've done a factory reset to the extender...nothing seems to be able to find the Router.