Cmk-agent-ctl -vv register endet in Fehler

Hallo zusammen
Das Registrieren des Agenten schlägt fehl, ich weiss nicht, wo ich ansetzen soll.

cmk-agent-ctl -vv register --hostname probe2200 --server master.cmk.local --site P13000 --user admin --trust-cert

INFO [cmk_agent_ctl] starting
INFO [cmk_agent_ctl] Loaded config from ‘“/var/lib/cmk-agent/cmk-agent-ctl.toml”’, connection registry from ‘“/var/lib/cmk-agent/registered_connections.json”’
DEBUG [reqwest::connect] starting new connection: https://master.cmk.local/

DEBUG [reqwest::connect] starting new connection: https://master.cmk.local:8001/
ERROR [cmk_agent_ctl] Error registering existing host at https://master.cmk.local:8001/P13000

Caused by:
0: Calling registration endpoint failed
1: error sending request for url (https://master.cmk.local:8001/P13000/agent-receiver/register_existing): connection closed before message completed
2: connection closed before message completed
r

Port 8001 ist aktiv und schickt auch ein Cert mit:
openssl s_client -connect master.cmk.local:8001

Version: 2.2.0p18
Agent socket: operational
IP allowlist: any
Legacy mode: enabled
No connections

Hallo ! Probiere mal die Registrierung mit einem/dem “Automation” Account:

cmk-agent-ctl register --hostname <hostname created in checkmk> \
    --server <IP of your linux server or DNS>:<Port> --site mysite \
    --user automation --password '<Automation Secret for Machine Accounts>' 

Optional: --trust-cert 

   
#Port can be found: 
omd config <sitename> show | grep AGENT_RECEIVED