When adding User - Error cluster not ready - no quorum? (500)

[jtasipit]

Hi please help, we have 3 node cluster Proxmox VE setup. The problem is when I add a user on Datacenter>Users, a dilog box appeared saying: Error cluster not ready - no quorum? (500). I also notice that one of the nodes cannot view other nodes on the Web GUI.

 

[jtasipit]

I've got it fixed already! I just Restart the node.