I did not know, that I have to connect to the camera.
I was surprised that the only way to connect to the camera is by running some terminal commands:
sudo snap connect openmapper-desktop:camera core:camera
this is not user friendly at all, (use case: user installs App over software center and then has to connect the camera via terminal?!?)
Nevertheless I tried to connect the camera, but it seems like there are some more bugs in the snapcraft, before connecting the camera, Apparmor tells me that I cannot access
now it after connecing to the camera, it says that I cannot access
Is there a solution in the future which is more user friendly than using terminal commands.