Problem with Green Unicorn server?

[KramRevilo]

A new deployment as project owner in GCP appears to go well with no errors but upon trying to do initial navigation to the Management Page I'm getting errors. The web page shows NGINX Bad Gateway HTTP 502 and the logs are showing gunicorn issues:

"Traceback (most recent call last):
  File "/layers/google.python.pip/pip/bin/gunicorn", line 8, in <module>
    sys.exit(run())
  File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/app/wsgiapp.py", line 67, in run
    WSGIApplication("%(prog)s [OPTIONS] [APP_MODULE]").run()
  File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/app/base.py", line 231, in run
    super().run()
  File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/app/base.py", line 72, in run
    Arbiter(self).run()
  File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/arbiter.py", line 229, in run
    self.halt(reason=inst.reason, exit_status=inst.exit_status)
  File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/arbiter.py", line 342, in halt
    self.stop()
  File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/arbiter.py", line 393, in stop
    time.sleep(0.1)
  File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/arbiter.py", line 242, in handle_chld
    self.reap_workers()
  File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/arbiter.py", line 525, in reap_workers
    raise HaltServer(reason, self.WORKER_BOOT_ERROR)
gunicorn.errors.HaltServer: <HaltServer 'Worker failed to boot.' 3>"

the end result is this error:

[start] 2022/03/11 17:11:04.959761 Start program failed: user application failed with exit code 1 (refer to stdout/stderr logs for more detail): exit status 1

So the management App Engine is failing upon first access.