Saw a few threads that were possibly similar to my issue, but they were either closed or I didn't want to butt into all ya'lls problem solving. Anyway..
I don't know about everyone else, but I don't login into the OS all the time. Pretty much get everything set up good, and then since everything is pretty much working I kind of forget to. So, it's probably been most of the winter since I've even tried.
The current setup on the property is: modem (standalone) -> R2 -> 2 access points
The wifi and my access point have been pretty good; I've just had to hard reset every so often, but that is normal here. Apparently the other access point stopped broadcasting a few weeks ago. (I wasn't told for at least 2 weeks and somehow that's MY problem - LOL - but I digress. That's its own thing).
Anyway, I'm attempting to troubleshoot this morning. I was thinking some of it could be the access point/powerline adapters in question as they are several years old and I doubt my sister is smart enough to have even unplugged and reset/refreshed them every so often. On the other hand, I figure I should boot up the OS and see if I can see anything within, if the access point is registered by the router etc., but no dice.
Last night I tried to login via the Netduma app - It gave me the message "An unexpected error has occurred". Weird. This morn, I have tried to login via browser: On my laptop here, it accepted my user/pass and seems to even still be in a login loop. It has the message(s) "DumaOS is not loaded yet! Don't worry we will redirect you shortly", and it seems to briefly attempt to load every few seconds. The end of the present url it is on is index.html?cache=0 if that tells anything. I then tried to login on my [android] phone browser, and that leaves the message "DumaOS is not running!"
It all seems quite odd, and my guess is I am just going to have to factory reset and set it all up again, but I figured I would post to see if there's any more simple solution first.