UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb1 in position 47: invalid start byte

[johnfoxii]

This happens with both the exe running on windows 10 and the .py on ubuntu python3. Both also have issues with the -r switch.
I am enclosing the -i and -o folders in "

archive is a GB uncompressed i could zip it up and put it onto a share if you want

backup being tested
ProductVersion
9.3.1
ProductType
iPhone6,1
BuildVersion
13E238