The guide on the GitHub repository is for Windows 10 users so, 7 may not be supported.

You can, however, check this: https://bitcointalk.org/index.php?topic=2825916.msg28950183#msg28950183

It's about the wallet but If the error mentioned there is related to Python, then maybe it could be a solution (hard to tell as you didn't give much info).

Alternatively, you could create an issue on the GitHub repo or contact the developer on the forums (inactive for some time).