What are the required permissions to use the enumerate_member_permissions.py script ?
It looks like you need at least:
resourcemanager.projects.get to use projects.getAncestry
resourcemanager.projects.getIamPolicy to use projects.getIamPolicy
resourcemanager.folders.getIamPolicy to use folders().getIamPolicy
resourcemanager.organizations.getIamPolicy to use organizations.getIamPolicy