My main router is a C5400x and runs awesome. I noticed today when looking at my WiFi extender RE550, the 5ghz led was off, I pulled it out of the wall reset it and added it through my tether app. It tells me it can't locate my host network? When I skip the 5ghz it connects fine to the 2.4 and shows and EXT and 5G Ext but is actually the 2.4 band. I have no idea what happened or what I need to do, I have tried 5 times to rebind it and get the same error message