AttributeError (Alfred 5, python3)

[jasondh]

just new to this workflow.
I believe I have all the new files installed in the workflow location.
Alfred just reverts to it's Fallback search when I enter any text.

I get the following error when trying to invoke any of the script keywords: HEX, DEC etc.

"AttributeError: module 'plistlib' has no attribute 'readPlist'

Log:
nsc.log
My exported workflow:
NSC.zip

[obstschale]

See here #12