Error: "LOGIN-LGNWNT32.DLL-890: The specified server is unknown"

I did a search on this and the closet match I found was TID 10079066. The
problem is that this addresses the 4.83 client and not the 4.9 client (and
above), which we're running. Also, the login results page shows the
context as the correct one as well as the tree but then the client logs
into another server and context entirely (not sure why). We then get 8884
errors when trying to map a drive to the "unknown server" which makes
sense. Anyone have any options for us?