Generate a Ply Book - Explore the Airframe Composites Designer Role

Hello Everyone. 

I am trying to complete Explore the Airframe Composites Designer Role and I am stuck at ply book generation lesson. 
I am being asked to upload CPD Text file from the search bar. I can locate the file, but I cant add it. 

The video sort of assumes that the CPD file adds itself and continues. Please Help. 


Nabeel Iqbal