Map doesn't show - only blue/grey square
When I start the app, I get a blue/grey background instead of a map.
Routes seem to compute normally, I see a distance to home that is correct, and other routes give a message that the route is being computed - all the while showing no map, just a blue/grey background.
I've tried downloading other maps, but Benelux, Western Europe and Europe all show the same blue/gray screen.
Re-installing the app (and losing all my destinations) didn't help either.
I'm not too sure on what happened before I got this - the phone is constantly updating apps of course, and I don't navigate daily - might not even be weekly.
It's an Samsung Note 4, running Android 7.1.2, no other issues that I know of, and as I write, it used to run just fine.
What now? Is there a logfile somewhere that I can post here?