This bug also arises when updating qubes-whonix workstation template, after installing the latest point release to fix the recent apt vulnerability. An older tor version is supplied by qubesctl, so I updated tor using the internal updater.
Please forgive my ignorance, but I’m not sure where to perform these instructions.
For example, I applied Patrick’s advice–which seemed to work–in the whonix ws template vm, but then running the anon-whonix torbrowser browser, I found even after a restart that it kept dying on this error.
Where does one normally apply instructions such as these? (My first thought was “in the template vm,” because I thought the app vms don’t persist changes…)