pretrained fastpitch not loading
an error appears:

ypeError                                 Traceback (most recent call last)
[<ipython-input-6-f04173251243>](https://localhost:8080/#) in <module>()
---> 19 fastpitch = FastPitchModel.from_pretrained("tts_en_fastpitch")

8 frames
[/usr/local/lib/python3.7/dist-packages/yaml/__init__.py](https://localhost:8080/#) in dump(data, stream, Dumper, **kwds)
    198     Emit YAML parsing events into a stream.
    199     If stream is None, return the produced string instead.
--> 200     """
    201     getvalue = None
    202     if stream is None:

TypeError: dump_all() got an unexpected keyword argument 'sort_keys'