Armadilloフォーラム

チュートリアルに従い作業を進めているのですが、Ethernetの設定を有効にするためのイメージファイルをAS3にアップロードするコマンドで
エラーが発生してしまいます。
原因と対処方法を教えていただけないでしょうか。

コマンドとエラー内容
---------------------------------
C:\Users\dev>azsphere image add --image enc28j60-isu0-int5.imagepackage
You have not selected a default tenant, please select one of the following to be your default tenant:
[1] ********（テナント名、IDが表示される）
[2] Cancel command
Please enter a choice [Default choice(2)]: 1
The command failed with an unexpected error. Here is the traceback:

'utf-8' codec can't decode byte 0x8f in position 10: invalid start byte
Traceback (most recent call last):
File "D:\a\1\s\azsphere-cli\build_scripts\windows\artifacts\cli\Lib\site-packages\knack/cli.py", line 215, in invoke
File "D:\a\1\s\azsphere-cli\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 654, in execute
File "D:\a\1\s\azsphere-cli\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 718, in _run_jobs_serially
File "D:\a\1\s\azsphere-cli\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 711, in _run_job
File "D:\a\1\s\azsphere-cli\build_scripts\windows\artifacts\cli\Lib\site-packages\six.py", line 703, in reraise
File "D:\a\1\s\azsphere-cli\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 688, in _run_job
File "D:\a\1\s\azsphere-cli\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 325, in __call__
File "D:\a\1\s\azsphere-cli\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/__init__.py", line 782, in default_command_handler
File "D:\a\1\s\azsphere-cli\build_scripts\windows\artifacts\cli\Lib\site-packages\azext_sphere_mammoth/custom/image.py", line 111, in image_add
File "D:\a\1\s\azsphere-cli\build_scripts\windows\artifacts\cli\Lib\site-packages\azext_sphere_mammoth/_utils.py", line 184, in call_with_transforms
File "D:\a\1\s\azsphere-cli\build_scripts\windows\artifacts\cli\Lib\site-packages\azext_sphere_mammoth/_utils.py", line 135, in _call
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8f in position 10: invalid start byte

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