The second post was from a time where the new versions were not officially released.
This happens when your VM doesn’t have the sdwdate-gui-client tag. It should be added automatically, but it’s a known issue it doesn’t happen in some cases:
Add it by running this in dom0:
qvm-tags <vm-name> add sdwdate-gui-client
If sys-whonix is not running, your dom0 syslog will silently be flooded with messages. I don’t know how to change this other than disabling sdwdate-gui, which, to my knowledge, is only used for reporting the state and doesn’t have any meaningful impact.