Incorrect image for virtualization

The issue

Your KS Assistant OS installation appears to run in a virtualized environment using a disk image which is not meant to run in a virtualized environment.

KS Assistant OS publishes specific images which support being run on a virtualized system. These are optimized to run in virtual environments, e.g. have guest tools installed and para-virtualization drivers enabled.

The solution

You need to reinstall KS Assistant OS using an image which supports being run on a virtualized system, see instructions here.