fingerprint not verified

Hello everybody! This error occurs when a node is connected to a worker cluster consisting of two nodes. Please tell me how to fix this error, what is a fingerprint, where can I find it? I'm new, so I apologize early for the incompetence.

Hallo zusammen, ich habe Testweise ein Cluster von mit 2 Systemen installiert. Ich hatte direkt nach der Installation beide Systeme zu einem Cluster verbunden. Lief scheinbar soweit ganz gut. Was mich etwas irritierte, die Logs, Tracking Center und Statistics zeigen immer nur Aktionen des...

hello i was wondering if someone has a solution to my problem. i've been trying to resolve it myself but after a week of searching and testing i've hit rock bottom. i've tried it within vmware (NAT or bridged gave same results) and with physical servers. but every time i i tell proxmox to add...