Thanks for the files, eureka.
The issue you are having is as simple as having configured syn3updater wrong, that’s why it’s not finding any packages, because you told syn3updater the unit was on 3.4, which is not right at the moment.
Redo everything, select any 3.0 as current version and the latest 3.4 as target.
That will create a reformat drive, that’s what the unit needs.