Streamlit-webrtc camera not displaying the video

when i try to start the camera , it loads for a while and then stops trying, after some seconds, I got the below log error. anyone help me to solve this error?

app -
repo - GitHub - swaminathan33/faceattendance

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.9/asyncio/", line 80, in _run, *self._args)
  File "/home/adminuser/venv/lib/python3.9/site-packages/aioice/", line 312, in __retry
    self.__protocol.send_stun(self.__request, self.__addr)
  File "/home/adminuser/venv/lib/python3.9/site-packages/aioice/", line 266, in send_stun
    self.transport.sendto(bytes(message), addr)
  File "/usr/local/lib/python3.9/asyncio/", line 1064, in sendto
  File "/usr/local/lib/python3.9/asyncio/", line 711, in _fatal_error
AttributeError: 'NoneType' object has no attribute 'call_exception_handler'