I posted this as a bug report a couple weeks ago but never got a reply. I figured I’d ask here. You need to have some .aif (or .aiff files) on your computer.
Create a sampler track.
Click the little folder icon on the sampler track.
Navigate to the .aif files. Are they greyed out for you? They are greyed out for me and I can’t drag them in unless I do it from a separate finder window. The issue is on Pro 9 and Elements here for me…