I cannot generate a map

I have had the indoor UWB beacons for 2 months now, and I am still not able to map the room. I bought 3 sets and none of them is working using the application.
What happens is that the application starts loading the map, then it crashes in the middle. I tried making sure that the beacons are in the same mesh…etc. But still, I have got no results. Please, could you help me with this? I really need it to work.