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Proxmox - Troubleshooting - noNVC fails to connect with Server disconnected (code: 1006)

SSH into the Proxmox host.

pvecm updatecerts --force
systemctl restart pvedaemon.service
systemctl restart pveproxy.service

Check Logs

cat /var/log/daemon.log | grep -e pveproxy -e pvedaemon

returns:

...
Jul 21 09:11:48 pve pvedaemon[191274]: <root@pam> successful auth for user 'root@pam'
Jul 21 09:11:55 pve pvedaemon[192394]: starting termproxy UPID:pve:0002EF8A:002A3230:60F7D6CB:vncshell::root@pam:
Jul 21 09:11:55 pve pvedaemon[191276]: <root@pam> starting task UPID:pve:0002EF8A:002A3230:60F7D6CB:vncshell::root@pam:
Jul 21 09:12:05 pve pvedaemon[192394]: command '/usr/bin/termproxy 5900 --path /nodes/pve --perm Sys.Console -- /bin/login -f root' failed: exit code 1
Jul 21 09:12:05 pve pvedaemon[191276]: <root@pam> end task UPID:pve:0002EF8A:002A3230:60F7D6CB:vncshell::root@pam: command '/usr/bin/termproxy 5900 --path /nodes/pve --perm Sys.Console -- /bin/login -f root' failed: exit code 1
Jul 21 09:12:14 pve pvedaemon[192565]: starting vnc proxy UPID:pve:0002F035:002A39AA:60F7D6DE:vncproxy:102:root@pam:
Jul 21 09:12:14 pve pvedaemon[191276]: <root@pam> starting task UPID:pve:0002F035:002A39AA:60F7D6DE:vncproxy:102:root@pam:
Jul 21 09:12:29 pve pvedaemon[191276]: <root@pam> end task UPID:pve:0002F035:002A39AA:60F7D6DE:vncproxy:102:root@pam: OK
Jul 21 09:12:33 pve pvedaemon[192703]: starting lxc termproxy UPID:pve:0002F0BF:002A4103:60F7D6F1:vncproxy:202:root@pam:
Jul 21 09:12:33 pve pvedaemon[191274]: <root@pam> starting task UPID:pve:0002F0BF:002A4103:60F7D6F1:vncproxy:202:root@pam:
Jul 21 09:12:33 pve pvedaemon[191276]: <root@pam> successful auth for user 'root@pam'
...

NOTE: The vncproxy is failing.