Login errors in Ubuntu 22.04

[ae33]

Hello,

I have installed the ProtonVPN CLIs and GUIs in MacOS, Arch Linux and Ubuntu 22.04. I have not had any login issues with either the MacOS or Arch Linux versions. However, when I try to execute a protonvpn-cli login <username> command in Ubuntu, I get the following error after I enter my password:

Unknown error occured. If the issue persists, please contact support.

The error message I see is the same whether or not I enter the correct password, and whether or not I try to login from the CLI or GUI (in Ubuntu). I can connect to the internet, just fine, in all of my other applications (including running a ping google.com command from the same terminal), so I don't believe it to be a network issue.