Getting Started with StudioX - Automate Excel Tasks

Going through the beginner training and am having an issue with one of the demos - I need to copy cell data from one workbook and use it as a new sheet name in another workbook. When I go to “Indicate in Excel” to reference the cell that contains the new sheet name, the workbook I would like to reference is not listed.

If I drag the card into the above task, it becomes available, however, this is not how it was shown in the demo, so I suspect I am doing something incorrectly:

If I were to select the cell while the card is in the above task, and then drag it out, I am getting the following error:


I am guessing it is an easy fix. Any feedback would be appreciated. Thank you