This is an unrelated error.

It has to do with whether or not the correct software components are located. It has nothing to do with USB, USB permissions, or so on. It does not make sense to try things like running as root, logging out, rebooting, or unplugging the machine. Those _will not_ address this issue.

Are other Inkscape extensions working at present? You might try Extensions > Render > Gear > Gear… , for example