Pasting SSO token from clipboard does not work on Linux

[jayhendren]

When trying to authenticate to Commander with an SSO token on Linux, the login command always fails to paste the SSO token after copying it from my web browser:

Logging in to Keeper Commander

SSO Login URL:
[redacted]

Navigate to SSO Login URL with your browser and complete login.
Copy a returned SSO Token into clipboard.
Paste that token into Commander
NOTE: To copy SSO Token please click "Copy login token" button on "SSO Connect" page.

  a. SSO User with a Master Password
  c. Copy SSO Login URL to clipboard
  o. Navigate to SSO Login URL with the default web browser
  p. Paste SSO Token from clipboard
  q. Quit SSO login attempt and return to Commander prompt
Selection: p
Failed to paste from clipboard
Selection:

I am on Ubuntu 24.04. I have tried putting the token into both the ctrl-v clipboard buffer and the text-highlight clipboard buffer with the same results for both.

This issue was also reported here, but no solution was found: https://community.spiceworks.com/t/coping-pasting-issue-from-clipboard/1158236