WP Lister Lite for eBay

hi, I don’t understand how the WP-Lister Lite plugin for eBay works.I managed to create the profile.I went to the woocommerce products, selected the products and with the drop-down menu, I went to the item: “sell on eBay” but it gave me the error 106 that the description was missing. I don’t know where to enter the description? Today I tried to put the products up for sale on eBay but the products were rejected because they are already present in the account. But my products are not uploaded to eBay.I tried to export the csv file and upload it to eBay, it gives me the error: product failed.What should I do?