'Provisional User' example needed to have search permissions added otherwise the sort and group dropdowns were not populated with the names of the properties of the issue. See the thread titled "access control rule for Sort and Group function" by austin.wangxu ending with: https://sourceforge.net/p/roundup/mailman/message/36408780/

#!/usr/bin/env python
from __future__ import print_function
import zlib, base64, sys
print(base64.encodestring(zlib.compress(sys.stdin.read())))