[opensuse-factory] What's happening to Virtualbox guest addons?

Hi fellow tumbleweed users. After having upgraded to the latest snapshot, my tumbleweed virtual machine again fails to light up display. According to system journal, vboxadd service failed with error “/var/lib/VBoxGuestAditions/config not found”, and it does not help to reinstall guest addon packages. Does anyone have a remedy? Kind regards, Howard