This issue started right after my TV automatically installed a firmware update that I didn't allow, and that I can't seem to get rid of. I read the same problem on another one of these questions, and the answer was to factory reset the TV. I did that. Twice.... and Netflix worked again both times after that, but only for 24 hours. Next day trying to access the app after resetting my TV provided me with the error code nw-4-7 again.
I shouldn't have to factory reset and change all my preferences and settings every other day to get Netflix to work on my TV. Is there a more permanent solution to this problem? And the answer better not be my "TV isn't compatible with new/updated apps" again like my old TV, cause I just got this one brand new 6 months ago and paid quite a lot for it.