K3S Second Master and Agent shows Metrics Error

Hello there,

I got a cluster with three serviers. 2 master & 1 slave. When i do a ‘sudo kubectl get nodes -o wide’ from master 1 everything workes fine. When I do the same on the second master i get the following messages:

as I learned from the documentation port 10250 must be reachable on every node. Thats the case.
Port 10250 is open between the servers.

Can anyone give me a hint what I am missing here?