Comment 10 for bug 1799710

I was affected by the bug, found this bug report, followed the instructions to activate -proposed and used "sudo apt-get install ubuntu-release-upgrader-gtk/bionic-proposed" to update the python3-distupgrade, ubuntu-release-upgrader-core and ubuntu-release-upgrader-gtk packages, deactivated -proposed, tried updating, and the whole update process worked fine, but I got some Apport window that opened and complained about some bug just after clicking on the Update button, the one that previously didn't work. I'll include the error message that I got in the terminal.