@Vero I'm encountering the same or similar problem. I've previously had a vanilla file filter action to search for files in my local repository. On my old machine it worked without any issues.
Now I've restored my time machine backup on a new machine and the workflow no longer works. It doesn't show anything. OS version (12.1) and mac model are the same.
TCC permissions for FDA and Accessibility are set and I've also removed and readded alfred without success. I am able to browse the entire disk with alfred.
I also followed your advise above, but it doesn't show any issues.
What else could be the reason?
@Papep0r I made a change this morning which fixes this issue in 11.3 - if you update to the Alfred 4.3.4 b1228 pre-release from Alfred's update prefs, then this should be fixed. Please let me know!