@buda I researched a bit further and managed to fix it on my kali setup, using some of the suggestions in this post.
The problem seems to be that you can only change Feed Owner when you are running the gvmd commands as the _gvm user.
This is what I did:
-
sudo runuser -u _gvm -- gvmd --get-users --verbose(notice this should be two - characters between _gvm and gvmd, not a long dash). This should return the users (mine gave only admin), and their uid -
sudo runuser -u _gvm -- gvmd --modify-setting 78eceaec-3385-11ea-b237-28d24461215b --value <uid>Where<uid>is the long guid string you just got from the command above, for the user you are running openvas under)