Hi, I think this may be a bug in the November release for the Power BI windows app.
Whenever I'm joing 2 columns from different tables I get an oops something went wrong - unable to get property 'value' of undefined or null reference. If I click cancel I can still create the join and it has no problems working. It's only since the November release came out that I've been having this problem.
Is anyone else having this problem or have an option to fix it?