Error: int() argument must be a string, a bytes-like object or a number, not 'NoneType'

[decalage2]

The Zloader sample https://bazaar.abuse.ch/sample/409c0fdd23e87d2181aed6a283d83cdeaa1b7fbb685df01b5358febb0d09c8b8/ triggers the following error:

Error [deobfuscator.py:2445 evaluation_result = self.evaluate_parse_tree(current_cell, parse_tree, interactive)]: int() argument must be a string, a bytes-like object or a number, not 'NoneType'

Then emulation does not really show what the macro is doing.