Using EasyEDA & LCSC for parts. Adding BOM to LCSC cart

[axeonic]

Hello, thanks for reading my question. I'm trying to add my BOM parts to my cart in LCSC. I click "add to cart",  a message box pops up with two input fields; "Include" and "Add to". The "include" field is empty, the "add to" field contains my cart# as seen in the attached image.

When clicking on the "include" field, nothing is displayed and I can't just click on the "Add" bottom at the bottom right. What goes in that "Include" box?

Sincere thanks for any help,
Tony