Qubes must be installed “bare metal”. Nothing underneath it. I have not done so, I. believe Ubuntu could be a guest OS.
Those error messages presume Qubes was installed first. Beware Qubes can want to take over the entirety of drives on computer. Might not be mandatory with the latest Qubes. As you can guess. Security mandates not having any thing else on computer. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/7a2d8ec6-23ea-4a82-bfbc-911e61cfec2b%40googlegroups.com.