This is not very useful. The exact wording of the error would help us to help you.
Open the Settings of this qube, tab Advanced and look what is chosen as Virtualization mode. If this is PVH then you are probably safe, since this kind of virtualization is very strong. You should use HVM if you attach any devices to this qube. PV is not recommended and less secure. More details: Standalones and HVMs | Qubes OS.
This looks like those file are not persistent: Templates | Qubes OS. This should help: How to make any file persistent (bind-dirs) | Qubes OS.