Debian Linux unattended client update broke connection on 21.2.2159.7699

I updated server to 21.2.2159.7699 from 20.12.1734.7640 today. Had much trouble with unattended clients upgrade (had to restart server 3 time to get through all reinstall unattended session)

Now, I find that all Linux (deb) upgrades broke connection from guest to host. Linux Guest appears offline

Doing systemctl status connectwisecontrol-xxxxxxxxxxx on the guest via SSH reveals that the service IS running on the Guest

tried :

sudo dpkg -i MyCompany.ClientSetup.deb again. 

no Errors but Guest is still down.

Please advise