The root of the issue is in fact a bug in the toolkit [1] that was fixed recently but has not hit ubuntu-app-platform yet. Because of that bug the popup prompting for the user password is not shown.
[1] https://bugs.launchpad.net/ubuntu/+source/webbrowser-app/+bug/1664620 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1671034 Title: Cannot use apt or other binaries installed on the system from the ubuntu-terminal-app snap To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1671034/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs