# Pastebin 3UYLtgWp
root@f7cb7727f38e:/code/listenbrainz# python3 -u -m listenbrainz.mbid_mapping_writer.mbid_mapping_writer
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/local/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/code/listenbrainz/listenbrainz/mbid_mapping_writer/mbid_mapping_writer.py", line 69, in <module>
    mw.run()
  File "/usr/local/lib/python3.10/site-packages/kombu/mixins.py", line 167, in run
    errors = (self.connection.connection_errors +
AttributeError: 'NoneType' object has no attribute 'connection_errors'