RBR850 - no access to interface

I  don't know the exact firmware number as I cannot access it currenlty. But, when I last checked 4 days ago, it said firmware was up to date.

I have tried Edge, Chrome, Orbi iPhone App.

I have not done a factory reset as it's kind of a last effort measure.  As I said, my network with over 80 Wifi devices is up and running and no issues. Problem is lack of access to the interface.

I know I have to reboot all and have all wifi devices reconnect but was trying to see if this was reported before.

As an aside, the main router light has remained on solid white.  I read somewhere on this forum this might indicate a set up that has not completed.  I don't understand why and how as eveything has been well for over a month.