Partner Message: May I make a suggestion, for any error message, please have the message indicate what exactly is needed to move on to the next page. In this case, instead of "additional information required" a message that reads "complete product price and product cost". Just my two cents as someone who uses this platform daily.
For example, this partner on their pop up store kept getting an "additional information required" message but weren't able to figure out what the issue was until they wrote into support.
The issue was the Product Price and Cost were left blank, but needed to be filled out even though the customer used the Price and Cost Variations for sizes. (image attached)