Runtime errors due to not using a gevent-websocket server

[gridhead]

Here's a log snapshot.

And here's a snippet for the copy-pasta convenience.

2022-03-07 08:27:58,070 - root - INFO - trigger_on_connect: client 1
2022-03-07 08:27:58,070 - werkzeug - INFO - 127.0.0.1 - - [07/Mar/2022 08:27:58] "POST /socket.io/?EIO=4&transport=polling&t=NzYJ-Sj&sid=b3TxuK8-F6M7KwDzAAAA HTTP/1.1" 200 -
2022-03-07 08:27:58,071 - werkzeug - INFO - 127.0.0.1 - - [07/Mar/2022 08:27:58] "GET /socket.io/?EIO=4&transport=polling&t=NzYJ-Sk&sid=b3TxuK8-F6M7KwDzAAAA HTTP/1.1" 200 -
2022-03-07 08:27:58,072 - werkzeug - INFO - 127.0.0.1 - - [07/Mar/2022 08:27:58] "GET /socket.io/?EIO=4&transport=websocket&sid=b3TxuK8-F6M7KwDzAAAA HTTP/1.1" 500 -
2022-03-07 08:27:58,074 - werkzeug - ERROR - Error on request:
Traceback (most recent call last):
  File "/home/t0xic0der/Projects/mote/venv/lib/python3.10/site-packages/werkzeug/serving.py", line 324, in run_wsgi
    execute(self.server.app)
  File "/home/t0xic0der/Projects/mote/venv/lib/python3.10/site-packages/werkzeug/serving.py", line 313, in execute
    application_iter = app(environ, start_response)
  File "/home/t0xic0der/Projects/mote/venv/lib/python3.10/site-packages/flask/app.py", line 2091, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/t0xic0der/Projects/mote/venv/lib/python3.10/site-packages/Flask_SocketIO-5.1.1-py3.10.egg/flask_socketio/__init__.py", line 43, in __call__
    return super(_SocketIOMiddleware, self).__call__(environ,
  File "/home/t0xic0der/Projects/mote/venv/lib/python3.10/site-packages/engineio/middleware.py", line 63, in __call__
    return self.engineio_app.handle_request(environ, start_response)
  File "/home/t0xic0der/Projects/mote/venv/lib/python3.10/site-packages/socketio/server.py", line 597, in handle_request
    return self.eio.handle_request(environ, start_response)
  File "/home/t0xic0der/Projects/mote/venv/lib/python3.10/site-packages/engineio/server.py", line 411, in handle_request
    packets = socket.handle_get_request(
  File "/home/t0xic0der/Projects/mote/venv/lib/python3.10/site-packages/engineio/socket.py", line 103, in handle_get_request
    return getattr(self, '_upgrade_' + transport)(environ,
  File "/home/t0xic0der/Projects/mote/venv/lib/python3.10/site-packages/engineio/socket.py", line 158, in _upgrade_websocket
    return ws(environ, start_response)
  File "/home/t0xic0der/Projects/mote/venv/lib/python3.10/site-packages/engineio/async_drivers/gevent.py", line 35, in __call__
    raise RuntimeError('You need to use the gevent-websocket server. '
RuntimeError: You need to use the gevent-websocket server. See the Deployment section of the documentation for more information.

werkzeug which happens to be the default WSGI for flask must be replaced by a gevent compatible WSGI.