Problem
univention-upgrade stops with CERTIFICATE_VERIFY_FAILED errror.
root@ucs:~# univention-upgrade
Starting univention-upgrade. Current UCS version is 4.3-3 errata410
Checking for local repository: none
The connection to the repository server failed: Configuration error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661). Please check the repository configuration and the network connection.
Solution
Update current certificates by executing:
root@ucs:~# update-ca-certificates