# from https://www.reddit.com/r/Proxmox/comments/avk2gx/help_cluster_not_ready_no_quorum_500/

systemctl stop pve-cluster
systemctl stop corosync
pmxcfs -l
rm /etc/pve/corosync.conf
rm /etc/corosync/*
killall pmxcfs
systemctl start pve-cluster