VirtualBox not able to use guest edition

[Laffen_EK1]

Hello.
I get this error when i try to resize virtual box to fit to full screen.

Any idea?

Thanks

[Utsuro]

Hi,
Maybe this could help:

VirtualBox (VERR_PDM_MEDIA_LOCKED)

[Laffen_EK1]

Thank you.
I could not make it work. But I scaled it up to 200% and then I can play with VirtualBox.

Regards

Edit: I got full screen when I installed Ubuntu-Mate 20.10 in VirtualBox...

Thanks