I always used NAVIT on a Linux laptop, and was quite happy with it; but it seems to have very little support recently. I installed it on a new laptop and it came up with some weirdo error message (“error:navit:traffic_new:wrong type ‘null’”), for which no explanations could be found, let alone a solution.
What to use instead? Requirements are the ability to run off-line, so map data for all of Europe must be downloadable in an easy way (which was getting harder and harder too, for navit), and get location info from a usb-connected GNSS receiver, probably through gpsd.
Any suggestions? I did consult https://wiki.openstreetmap.org/wiki/Routing/offline_routers but found only confusion.
(nb apologies if the question was asked before, or if posted in an incorrect sub-section)