Unable to load access control list: Connection refused

I've problem with the access to the gui of proxmox and i can't use the terminal, because all that I type of proxmox says

ipcc_send_rec[1] failed: Connection refused
ipcc_send_rec[2] failed: Connection refused
ipcc_send_rec[3] failed: Connection refused
Unable to load access control list: Connection refused

service pve-cluster restart
Job for pve-cluster.service failed because the control process exited with error code.
See "systemctl status pve-cluster.service" and "journalctl -xe" for...

Read more