Not opening Qubes Update Gui

[alimirjamali]

@qn00r3

Do I understand correctly that version 4.2.23 is only available in the current-testing repository and I need to wait until version 4.2.23 becomes available in the current repository?

YES

@qn00r3

To install version 4.2.23 from the current repository, I need to periodically check for updates in dom0 : qubes-dom0-update ?

The system will do background refresh of update availability checks automatically. You do not need to periodically check for it manually. But you can if you wish. Please also note that if system finds available updates for dom0 or any other template via background checks, you will see the update availability notifier and the Updater GUI will not crash.