magic-wormhole fails in test stage with errors similar to following:

Expected: (<class 'wormhole.errors.WelcomeError'>,)
Got: [Failure instance: Traceback: <class 'TypeError'>: an integer is
required (got type bytes)

Attaching build log.
commit: 8ba4d8a347fbdf9fe09e8ac801b4ac0586ac382a