Coldcard HW wallet issues

Hey guys,
I can’t get my Coldcard to run with Sparrow software. When I try to connect via usb using sys-usb Sparrow recognises the Coldcard, but throws an error saying “Could not open client or get fingerprint information: open failed.”. What can I do to resolve this error? (I know I can try the airgapped way via sd card, but that is not what I want).

Thanks a lot.

Could you be more specific here? Are you using Qubes Devices widget to connect the device to an AppVM? Did you try to do everything in sys-usb?