[SOLVED] How to join a cluster with only one link

[showiproute]

I have reinstalled one of my Proxmox PVEs and wanted to join the cluster again.
Unfortunately I am not able to as the GUI and the CLI wants to have two links?
! node 'proxmox1' is missing address forinterface number 1

Can someone please tell me what I am doing wrong?

 

[showiproute]

Okay seems it was an invalid corosync configuration