Nothing is shown in the 'Select Table/Column' drop down menus for importing manual steps from an excel file

The issue I am having is importing excel files. My excel file consists of nothing but a few steps in column A, rows 1 - 3. Whenever I try to import the XLSX, after inputting the file path, I move to the Select Table drop down menu and click on the arrow. As you can see in the screenshot, nothing shows up when it drops down. The same thing happens for the Select Column drop down menu.

What am I doing wrong?

~ Max