Category "navigationcontroller"

exception: View does not have a navController set

in the fragment which i made it host in the tag fragment in activity when i use navController = Navigation.findNAvController(view) the app crashes by the error:

Last navigation gets resubmitted

Okay, so I'm not sure, what exactly triggers that. But I have a suspicion. Sadly it will get hard to make a MWE, since it is a very complex app with lots of fra