the following error no detailed information, don’t know what went wrong code

Traceback (most recent call last):
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/site-packages/gunicorn/arbiter.py", line 203, in run
    self.manage_workers()
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/site-packages/gunicorn/arbiter.py", line 545, in manage_workers
    self.spawn_workers()
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/site-packages/gunicorn/arbiter.py", line 617, in spawn_workers
    time.sleep(0.1 * random.random())
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/site-packages/gunicorn/arbiter.py", line 245, in handle_chld
    self.reap_workers()
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/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>

Just add the parameter — preload to the gunicorn command to see the detailed error message
. Add the parameter and the error message is:

Traceback (most recent call last):
  File "/home/charleswu/.virtualenvs/process/bin/gunicorn", line 11, in <module>
    sys.exit(run())
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 61, in run
    WSGIApplication("%(prog)s [OPTIONS] [APP_MODULE]").run()
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/site-packages/gunicorn/app/base.py", line 223, in run
    super(Application, self).run()
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/site-packages/gunicorn/app/base.py", line 72, in run
    Arbiter(self).run()
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/site-packages/gunicorn/arbiter.py", line 60, in __init__
    self.setup(app)
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/site-packages/gunicorn/arbiter.py", line 120, in setup
    self.app.wsgi()
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/site-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 52, in load
    return self.load_wsgiapp()
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/home/charleswu/.virtualenvs/process/lib/python3.6/site-packages/gunicorn/util.py", line 350, in import_app
    __import__(module)
  File "/home/charleswu/AiDoctor/process_bchao/app.py", line 44, in <module>
    app = create_application()
  File "/home/charleswu/AiDoctor/process_bchao/app.py", line 31, in create_application
    from webapi import image_api
  File "/home/charleswu/AiDoctor/process_bchao/webapi/__init__.py", line 3, in <module>
    from .upload_image import image_api
  File "/home/charleswu/AiDoctor/process_bchao/webapi/upload_image.py", line 9, in <module>
    from interface import get_b_result
  File "/home/charleswu/AiDoctor/process_bchao/interface.py", line 6, in <module>
    from structuration import Struct
  File "/home/charleswu/AiDoctor/process_bchao/structuration.py", line 7, in <module>
    from split_word import desc_list, diag_list
ModuleNotFoundError: No module named 'split_word'

done!!!