Pytho 、Magenta　エラー文解決

前提・実現したいこと

はじめてPythonに触りました。
Magentaを使って作曲をしようと思い
参考書→（Magentaで開発AI作曲）
参考にしたサイト(https://note.com/sagara_nobuhiko/n/n85de1f09af81)
みながら進めていたんですけど最後の工程でつまずいてしまいました。
特に最後のUnicodeDecodeErrorの解決方法やFileから続いてるエラー文の解決方法がわかりません

発生している問題・エラーメッセージ

実際に書いたプログラム
melody_rnn_generate ^
More? --config=basic_rnn ^
More? --bundle_file=\Users\user\Desktop\magenta_de\basic_rnn.mag ^
More? --output_dir=\Users\user\Desktop\magenta_de/temp ^
More? --num_outputs=5 ^
More? --num_steps=256 ^
More? --num_qpm=128 ^
More? --primer_melody="[60]"

エラーメッセージ
c:\users\sota\desktop\magenta_de\magenta-env\lib\site-packages\librosa\util\decorators.py:9: NumbaDeprecationWarning: [1mAn import was requested from a module that has moved location.
Import requested from: 'numba.decorators', please update to use 'numba.core.decorators' or pin to Numba version 0.48.0. This alias will not be present in Numba version 0.50.0.[0m
  from numba.decorators import jit as optional_jit
c:\users\sota\desktop\magenta_de\magenta-env\lib\site-packages\librosa\util\decorators.py:9: NumbaDeprecationWarning: [1mAn import was requested from a module that has moved location.
Import of 'jit' requested from: 'numba.decorators', please update to use 'numba.core.decorators' or pin to Numba version 0.48.0. This alias will not be present in Numba version 0.50.0.[0m
  from numba.decorators import jit as optional_jit
c:\users\sota\desktop\magenta_de\magenta-env\lib\site-packages\pydub\utils.py:170: RuntimeWarning: Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work
  warn("Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work", RuntimeWarning)
WARNING:tensorflow:From c:\users\sota\desktop\magenta_de\magenta-env\lib\site-packages\tensorflow\python\compat\v2_compat.py:111: disable_resource_variables (from tensorflow.python.ops.variable_scope) is deprecated and will be removed in a future version.
Instructions for updating:
non-resource variables are not supported in the long term
Traceback (most recent call last):
  File "C:\Users\sota\AppData\Local\Programs\Python\Python37\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "C:\Users\sota\AppData\Local\Programs\Python\Python37\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\sota\Desktop\magenta_de\magenta-env\Scripts\melody_rnn_generate.exe\__main__.py", line 7, in <module>
  File "c:\users\sota\desktop\magenta_de\magenta-env\lib\site-packages\magenta\models\melody_rnn\melody_rnn_generate.py", line 252, in console_entry_point
    tf.app.run(main)
  File "c:\users\sota\desktop\magenta_de\magenta-env\lib\site-packages\tensorflow\python\platform\app.py", line 40, in run
    _run(main=main, argv=argv, flags_parser=_parse_flags_tolerate_undef)
  File "c:\users\sota\desktop\magenta_de\magenta-env\lib\site-packages\absl\app.py", line 312, in run
    _run_main(main, args)
  File "c:\users\sota\desktop\magenta_de\magenta-env\lib\site-packages\absl\app.py", line 258, in _run_main
    sys.exit(main(argv))
  File "c:\users\sota\desktop\magenta_de\magenta-env\lib\site-packages\magenta\models\melody_rnn\melody_rnn_generate.py", line 224, in main
    bundle = get_bundle()
  File "c:\users\sota\desktop\magenta_de\magenta-env\lib\site-packages\magenta\models\melody_rnn\melody_rnn_generate.py", line 126, in get_bundle
    return sequence_generator_bundle.read_bundle_file(bundle_file)
  File "c:\users\sota\desktop\magenta_de\magenta-env\lib\site-packages\magenta\models\shared\sequence_generator_bundle.py", line 32, in read_bundle_file
    bundle.ParseFromString(f.read())
  File "c:\users\sota\desktop\magenta_de\magenta-env\lib\site-packages\tensorflow\python\lib\io\file_io.py", line 118, in read
    self._preread_check()
  File "c:\users\sota\desktop\magenta_de\magenta-env\lib\site-packages\tensorflow\python\lib\io\file_io.py", line 81, in _preread_check
    compat.path_to_str(self.__name), 1024 * 512)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8e in position 90: invalid start byte