Issues with apt-cacher-ng

I cannot update Fedora based dispVMs, nor Whonix-based dispVMs. Only Debian based dispVMS. When all are offline, of course. To my surprise, Fedora dvm templates can be updated (as Debian dvm templates, of course), but Whonix dvm templates not, complaining

E: Failed to fetch tor+http://deb.qubesosfasa4zl44o4tws22di6kepyzfeqv3tg4e3ztknltfxqrymdad.onion/r4.1/vm/dists/bullseye-securitytesting/InRelease Read error - read (104: Connection reset by peer) Reading the greet back from SOCKS proxy socks5h://127.0.0.1:9050 failed [IP: 127.0.0.1 9050]

All templates, including Whonix, can be updated normally.

So, I’m not sure what in your post addresses my issue?