I succesfully used the upgrade tool to upgrade Qubes from R4.0 to R4.1 Now, when I want to start my Windows 7 VM’s, I get the error that libxenlight cannot create the new domain. I’ve found this issue: Migrate backups of Windows VMs created under Qubes R4.0 to R4.1 · Issue #7088 · QubesOS/qubes-iss…

Windows Qubes do not start after upgrading to R4.1

enmus May 7, 2022, 3:18pm 7

Well, I don’t remember having linux-stubdom feature ever, but stubdom-qrexec.
Did you follow this procedure?