Automation and creation of agents

CMK version: 2.1.0p1
OS version:

Error message:
Agents are not signed anymore after adding a new host. I have activated the option to create agents automatically but this option is not signing the agents and so the “automatic agent updater” cannot pull new agents.
Does anyone know how the concept is?

Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins)