1099-B Worksheet Error: Keep asking "Date Acquired must be entered for xxx"

Hi,

I imported a 1099-B form and each stock seems to have correct information (i.e. acquired date, date sold, etc). However, it keeps saying there is an error and the Date Acquired must be entered for xxx stock while reviewing the report even after I entered the date manually. Data was imported from M1 Finance. Not sure how to fix this. Any help/advice/tip would be greatly appreciated. Thanks.