Workstation does not update anymore

Hi,

since a while, my workstation does not update anymore, here is the error I get.
Any suggestions how to proceed ? In Noob language please…
Gateway update works fine…

user@host:~$ sudo apt-get-update-plus dist-upgrade
Ign:1 tor+https://deb.debian.org/debian-security buster/updates InRelease
Ign:2 tor+https://deb.debian.org/debian buster-updates InRelease
Ign:3 tor+https://deb.debian.org/debian buster InRelease
Ign:4 tor+https://deb.whonix.org buster InRelease
Err:5 tor+https://deb.debian.org/debian-security buster/updates Release
Certificate verification failed: The certificate is NOT trusted. The certificate issuer is unknown. Could not handshake: Error in the certificate verification. [IP: 127.0.0.1 9050]
Err:6 tor+https://deb.debian.org/debian buster-updates Release
Certificate verification failed: The certificate is NOT trusted. The certificate issuer is unknown. Could not handshake: Error in the certificate verification. [IP: 127.0.0.1 9050]
Err:7 tor+https://deb.whonix.org buster Release
Certificate verification failed: The certificate is NOT trusted. The certificate issuer is unknown. Could not handshake: Error in the certificate verification. [IP: 127.0.0.1 9050]
Err:8 tor+https://deb.debian.org/debian buster Release
Certificate verification failed: The certificate is NOT trusted. The certificate issuer is unknown. Could not handshake: Error in the certificate verification. [IP: 127.0.0.1 9050]
Reading package lists…
W: tor+https://deb.debian.org/debian-security/dists/buster/updates/InRelease: No system certificates available. Try installing ca-certificates.
W: tor+https://deb.whonix.org/dists/buster/InRelease: No system certificates available. Try installing ca-certificates.
W: tor+https://deb.debian.org/debian/dists/buster-updates/InRelease: No system certificates available. Try installing ca-certificates.
W: tor+https://deb.debian.org/debian/dists/buster/InRelease: No system certificates available. Try installing ca-certificates.
W: tor+https://deb.debian.org/debian-security/dists/buster/updates/Release: No system certificates available. Try installing ca-certificates.
W: tor+https://deb.whonix.org/dists/buster/Release: No system certificates available. Try installing ca-certificates.
E: The repository ‘tor+https://deb.debian.org/debian-security buster/updates Release’ no longer has a Release file.
W: tor+https://deb.debian.org/debian/dists/buster-updates/Release: No system certificates available. Try installing ca-certificates.
E: The repository ‘tor+https://deb.debian.org/debian buster-updates Release’ no longer has a Release file.
W: tor+https://deb.debian.org/debian/dists/buster/Release: No system certificates available. Try installing ca-certificates.
E: The repository ‘tor+https://deb.whonix.org buster Release’ no longer has a Release file.
E: The repository ‘tor+https://deb.debian.org/debian buster Release’ no longer has a Release file.

If this warning message is transient, it can be safely ignored. Otherwise, try one of the fixes below. Change your Tor circuit and/or try again later.

Did you uninstall (apt get purge / remove) any packages?

Hi,

thanks fo replying.
No, I did not uninstall anything, I only ever updated when whonix check asked me to.
I tried so often now to update, after several restarts etc., always the same result.
How should I proceed, simply install everything from scratch ?

Thanks.

…any further advice on this topic please ?

thx…

That would be the easiest. Fixing this might be possible but too consuming to explain.