Heroku Dash Favicon not found error

Heroku deployed dash app crashes with error

at=error code=H10 desc=“App crashed” method=GET path="/" host=uganda-cehs.herokuapp.com request_id=bd563b7c-5e96-461e-a558-114b305eb279 fwd=“41.190.135.51” dyno= connect= service= status=503 bytes= protocol=https

at=error code=H10 desc=“App crashed” method=GET path="/favicon.ico" host=uganda-cehs.herokuapp.com request_id=a9b2b015-488a-4a5e-be0a-2a32dca15de9 fwd=“41.190.135.51” dyno= connect= service= status=503 bytes= protocol=https

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Having the same issue. However don’t think it is a plotly problem as the app runs locally, with the favicon showing