Failed to get a console object

[Olleg]

I develop HA cluster and use VirtualBox to test the system in loop. When I test in loop boot/shutdown and have opened GUI, sometimes I see next error window:

Failed to open a session for the virtual machine witness.

Failed to get a console object from the direct session (VBOX_E_INVALID_OBJECT_STATE).

Result Code: VBOX_E_VM_ERROR (0x80BB0003)
Component: MachineWrap
Interface: IMachine {5047460a-265d-4538-b23e-ddba5fb84976}

But this does not stop the running test script or virtualbox itself. I hope I'll can attach screenshot and logs. As far as I see the error is risen on massive (I use 9 VM) simultaneous shutdown by command

VBoxManage controlvm "$h" acpipowerbutton

[Olleg]

screenshot

[Olleg]

VBoxSVC.log (error is here)

[Olleg]

selectorwindow.log

[Olleg]

VBox.log of VM mentioned in error message

[Olleg]

Topic in the forum: ​https://forums.virtualbox.org/viewtopic.php?f=8&t=94501