Container will not run (setuptools was not found)

[AdamLMark]

When I try to run this container it stops immediately. The logs indicate an issue with setuptools and supervisor:

  File "/usr/local/bin/supervisord", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3191, in <module>
    @_call_aside
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3175, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3204, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 583, in _build_master
    ws.require(__requires__)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 900, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 786, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'setuptools' distribution was not found and is required by supervisor

Versions:
Docker version 20.10.12, build e91ed57
Debian 11 (bullseye)
supervisord 4.2.4

I believe I have all the dependencies installed.
Cheers!

Edit: Same issue with a fresh Ubuntu 20.04 install.

[AdamLMark]

Turns out it's a widespread issue
#447