Document Loading, JSON Decode Error

Short Course Q&A LangChain: Chat with Your Data
1

This code in Cell 11 of Document Loading generates a JSON Decode error, any way to isolate what’s happening?

Cell [11]: url="https://www.youtube.com/watch?v=jGwO_UgTS7I"
save_dir="docs/youtube/"
loader = GenericLoader(
    YoutubeAudioLoader([url],save_dir),
    OpenAIWhisperParser()
)
docs = loader.load()

[ExtractAudio] Not converting audio docs/youtube//Stanford CS229： Machine Learning Course, Lecture 1 - Andrew Ng (Autumn 2018).m4a; file is already in target format m4a
Transcribing part 1!
---------------------------------------------------------------------------
JSONDecodeError                           Traceback (most recent call last)
File /usr/local/lib/python3.9/site-packages/openai/api_requestor.py:669, in APIRequestor._interpret_response_line(self, rbody, rcode, rheaders, stream)
    668 try:
--> 669     data = json.loads(rbody)
    670 except (JSONDecodeError, UnicodeDecodeError) as e:

File /usr/local/lib/python3.9/json/__init__.py:346, in loads(s, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw)
    343 if (cls is None and object_hook is None and
    344         parse_int is None and parse_float is None and
    345         parse_constant is None and object_pairs_hook is None and not kw):
--> 346     return _default_decoder.decode(s)