Kingsmarch Mapdevice bugged

Hey,

one of my three devices in kingsmarch is bugged, can't use it at all.
The first map-slot from the left has a blue border and it says 'take rewards', but there is no map in there. So I can't click on it. Tried putting a map in there, but now the map is stuck in there aswell. Mappers are not actively running maps, can't open/resume mapping, can't exit mapping. tried removing mappers and re-adding them, nothing works.

Solved, after adding a map, then adding mappers, then removing them and waiting a bit, it now works