For the last week or 2 it is near impossible to acquire bounties through the app. All it says is failed to retrieve bounty or something similar.
App is very slow and sluggish loading anything lately as well besides forums. Director and trying to load your characters or vault to move equipment has been slow as well.
Okay so I can't fix the slow loading (it's been like that all week for me, I wonder if it's a server thing); but try logging in and out of the app. And ofc force stopping and clearing the cache. I haven't needed to do this recently but it fixed it the last time I had an issue.
I hope it sorts it out :)