Streamlit WebRTC Keeps Loading - "NoneType" Attribute Error

[Vedha0541]

I'm experiencing an issue where my Streamlit WebRTC app keeps loading without connecting. When I run the app locally, it gets stuck at the loading screen, and I receive the following error:

AttributeError: 'NoneType' object has no attribute 'sendto'

Traceback:

Exception in callback Transaction..._retry() ... self._sock.sendto(data, addr) AttributeError: 'NoneType' object has no attribute 'sendto'

During handling of the above exception, another exception occurred: ... AttributeError: 'NoneType' object has no attribute 'call_exception_handler' I am not sure whether this issue is related to my local setup (e.g., laptop configuration, firewall settings, Python environment) or if it's a problem with Streamlit WebRTC itself. Could you please advise on how to troubleshoot this issue or confirm if this is a known bug with Streamlit WebRTC?

[Gayathri-Selvaganapathi]

Here are the possible troubleshooting steps:

1.Python Environment: Ensure that all libraries are up to date, as streamlit-webrtc and WebRTC components frequently update to resolve connectivity issues. Update them using:

pip install --upgrade streamlit streamlit-webrtc 

Sometimes issues arise with WebRTC components if conflicting versions of dependencies are present, so a virtual environment with fresh installations might help resolve this.

2.Verify Emotion Model and Files: Ensure that model.h5, labels.npy, and emotion.npy files are correctly loaded without errors. If any of these files are missing or corrupted, they could disrupt the Streamlit WebRTC pipeline.

3.Clear Streamlit Cache and Restart: Occasionally, Streamlit caching can cause issues if the previous state doesn’t fully clear. Restart the Streamlit server and clear the cache:

streamlit cache clear
streamlit run app.py