Record Demo Data not working properly

[BialArno]

Odoo version 12, runbot_testing_recording version 12

While recording demo data (using Record Demo Data) in the end it errors out with error related to 444 line of controllers/main.py. Found problem with def format_python_xml function, for me it ended up that data_to_xml was list with single binary element so function "".join(data_to_xml) errored since it was expecting string instead of bytes (that it received).

Basic Fix (at least it worked for me): "".join(data_to_xml[0].decode("utf-8"))