CLI command qm is your friend. List/manipulate VMs and such with this utility.

The automatic package update script will fail, because ProxMox “assumes” you will have a subscription (silly ProxMox). To fix this, the process must run at least once (and fail) and then it can be flipped to the “no-subscription repository” as follows…

Select “Repositories” underneath “Updates”
Disable the ceph-quincy and pve repositories
Click “Add”
In the Repository drop-down box, select “No-Subscription” and click Add.

Edit the file - /etc/pve/local/qemu-server/<VMID>.conf

Add args: -vnc 0.0.0.0:77 to the end of the file (choose a unique number after the : for each guest)

A VNC connection to the guest is now possible by specifying the host IP address and the port chosen (“5977” in the example above).

To install:

apt install -y rsyslog

Login to the ProxMox node via ssh and run the following code:

sed -Ezi.bak "s/(function\(orig_cmd\) \{)/\1\n\torig_cmd\(\);\n\treturn;/g" /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js && systemctl restart pveproxy.service

If/when the proxmox-widget-toolkit package gets updated, this command will need to be run again.