Moving project not working

[jamesallen1705]

I'm attempting to move a series of workbooks using code adapted from this script;

https://github.com/tableau/server-client-python/blob/master/samples/move_workbook_projects.py

I've nested the script in a loop so that I can iterate over a set of luids (we have over 100 workbooks to move);

It's getting stuck at the first line of step 4;

I can't see where I am going wrong, can anyone help?