Hello,

I watched this video on how to customize a ribbon:

https://www.youtube.com/watch?v=NEWyGAPkP3Q

At 1:20 to 1:43 of the video she explains how when we open an excel file in the Custom UI editor, we get the sample code of the ribbon!

When I do this, in custom UI editor, I get a blank page

Why is it that she says we are supposed to see the sample XML code, and I see a blank page....

Thanks all for your help
rn