automx failing with error 500 on production server

The relevant logs seem to be here: sudo docker-compose exec automx cat /var/log/apache2/error.log

With our docker image, it shows these errors:

TypeError: sequence of byte string values expected, value of type str found
Missing section 'automx'
mod_wsgi (pid=34): Exception occurred processing WSGI script '/usr/lib/automx/automx_wsgi.py'.

These seem like problems with Python2 vs Python3. Maybe it is part of the problem that the image contains both Python versions for some reason.

With the upstream Docker image, the error is this one:

Missing section 'automx', referer: https://autoconfig.e.email/
Missing section 'automx'