I have just one primary server in the zone. I applied successfully 11.2.3a, then its Monthly update. For 11.2.4, I manually imported the zip file. I'll try to describe what I see in ZCC, translated from French.

In the deployment section, I have one peripheral assigned (my primary server), and it stays in the "waiting" state. I try to refresh but nothing starts. On the server, typing "zac zl -l" replies "Closest servers not found for any role". I also tried "zac retr" but it replies that it cannot connect.