I fixed this by:
-going to "FORMS"
-then selecting "Emp Stock Wks"
-scroll down to LINE 27
-column (b)
-right-click to manually override. Then enter the number of shares sold. (For me it was 1. I believe it's the 1 qty that was causing issue.)
If you run into errors:
-check LINE 25
-column (e) should be blank
-column (f) should be blank
