Warning USB in dom0 is not restricted!

After I installing Qubes 4.1 I had this issue …

I am using Qubes with external hub for keyboard…

More related issues, my sys-firewall shut down and didn’t wok.

How I can solve this problem?

There are various Qubes OS doc pages on USB that should explain it.

Unrestricted USB in dom0 means that any USB drive attached to dom0 can compromise it.

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How I can solve this problem?

It seems you haven’t created USB qube during setup - which let your dom0 exposed to any USB device you attach - as the warning says. See USB qubes | Qubes OS what to do.