Error Messages:
Exception in thread Thread-3:
Traceback (most recent call last):
  File "/home/comz/anaconda3/envs/arcface/lib/python3.7/threading.py", line 926, in _bootstrap_inner
    self.run()
  File "/home/comz/anaconda3/envs/arcface/lib/python3.7/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "usb_camera.py", line 140, in <lambda>
    Process(target=lambda: asyncio.run(upload_loop())).start()
  File "/home/comz/anaconda3/envs/arcface/lib/python3.7/asyncio/runners.py", line 43, in run
    return loop.run_until_complete(main)
  File "/home/comz/anaconda3/envs/arcface/lib/python3.7/asyncio/base_events.py", line 587, in run_until_complete
    return future.result()
  File "usb_camera.py", line 51, in upload_loop
    await sio.connect(url)
  File "/home/comz/anaconda3/envs/arcface/lib/python3.7/site-packages/socketio/asyncio_client.py", line 117, in connect
    raise exceptions.ConnectionError(exc.args[0]) from None
socketio.exceptions.ConnectionError: OPEN packet not returned by server

Solution:

pip install python-engineio==3.14.2 python-socketio==4.6.0