Virtualbox can't start a guest caused by NS_ERROR_FACTORY_NOT_REGISTERED

[Ralf Mardorf <ralf.mardorf@xxxxxxxxxxxxxx>]

PS:

After launching Virtualbox:

[rocketmouse@archlinux .VirtualBox]$ grep ERROR VBoxSVC.log
[rocketmouse@archlinux .VirtualBox]$

After selecting a VM and pushing start:

[rocketmouse@archlinux .VirtualBox]$ grep ERROR VBoxSVC.log
00:02:14.653426 nspr-3   ERROR [COM]: aRC=VBOX_E_INVALID_VM_STATE (0x80bb0002) aIID={480cf695-2d8d-4256-9c7c-cce4184fa048} aComponent={Machine} aText={Machine is not locked for session (session state: Unlocked)}, preserve=false
[rocketmouse@archlinux .VirtualBox]$