I did everything also just like you posted. Tried removing then readding the apps - got error indicating they can't be added back. (Max and Disney). Tried factory reset - that did not work. Tried full restore - that did not work. There is nothing wrong with my internet connection, the TV will not let me add back my Roku account to the TV. But I can log into my Roku account on my laptop as I am right now. I gave up, the TV is useless now.
It looks like the Roku outage is fixed. I was able to get the apps installed and working, as well as completing the factory reset.
I hope you have the same results.
