@isabel-t, maybe try to reinstall virtualbox, assuming your disabling of the validation was successful and that isn't the problem any more. Sorry, don't have much more on this, for me disabling validation solved the problem.
@isabel-t, maybe try to reinstall virtualbox, assuming your disabling of the validation was successful and that isn't the problem any more. Sorry, don't have much more on this, for me disabling validation solved the problem.