Hi, Pierre.

Thank you very much for quickly reply.

Based on Pierre's advice,
I deleted the edk2 directory that I had been using and ran the git clone of edk2 again,
,also used the master branch to specify the latest commit as of yesterday.
I also took Sami's advice and specified Python 3.7.

Under these conditions, the build finished successfully without any problems.

Thank you very much for your help.

Best regrads,
Shuuichrou.