def _supports_range_index(self) -> bool:
        """Prophet does not support integer range index."""
        raise_if(
            True,
            "Prophet does not support integer range index. The index of the TimeSeries must be of type "
            "pandas.DatetimeIndex",
            logger,
        )
        return False
Prophet does not support integer range index.
darts/models/forecasting/prophet_model.py