Traceback (most recent call last):


 "D:\Polis\Sign\web-server\venv\lib\site-packages\werkzeug\serving.py", line 270, in run_wsgi

execute(self.server.app)


 "D:\Polis\Sign\web-server\venv\lib\site-packages\werkzeug\serving.py", line 258, in execute

application_iter = app(environ, start_response)


 "D:\Polis\Sign\web-server\venv\lib\site-packages\flask\app.py", line 2309, in __call__

return self.wsgi_app(environ, start_response)


 "D:\Polis\Sign\web-server\venv\lib\site-packages\flask_socketio\__init__.py", line 44, in __call__

start_response)


 "D:\Polis\Sign\web-server\venv\lib\site-packages\engineio\middleware.py", line 59, in __call__

return self.engineio_app.handle_request(environ, start_response)


 "D:\Polis\Sign\web-server\venv\lib\site-packages\socketio\server.py", line 428, in handle_request

return self.eio.handle_request(environ, start_response)


 "D:\Polis\Sign\web-server\venv\lib\site-packages\engineio\server.py", line 340, in handle_request

environ, start_response)


 "D:\Polis\Sign\web-server\venv\lib\site-packages\engineio\socket.py", line 106, in handle_get_request

start_response)


 "D:\Polis\Sign\web-server\venv\lib\site-packages\engineio\socket.py", line 146, in _upgrade_websocket

return ws(environ, start_response)


 "D:\Polis\Sign\web-server\venv\lib\site-packages\engineio\async_drivers\eventlet.py", line 16, in __call__

raise RuntimeError('You need to use the eventlet server. '
RuntimeError: You need to use the eventlet server. See the Deployment section of the documentation for more information.

Traceback (most recent call last):


 "/usr/lib/python3.9/logging/__init__.py", line 1082, in emit

stream.write(msg + self.terminator)
RuntimeError: reentrant call inside <_io.BufferedWriter name='<stderr>'>
