This is a very niche issue that I have encountered, if you have a proxmox server deployed and you have this extension in the browser you use to access it you cannot connect to any console sessions within it, you also cannot connect to the server shell. You will receive undefined (code: 1006) as a error with a TASK ERROR: command '/usr/bin/termproxy 5901 --path /nodes/proxmox --perm Sys.Console -- /bin/login -f root' failed: exit code 1. And if you follow that code like I did all you will find is something about a node being offline, which was a bit of an issue for me as I never had a node to begin with.