GTIN not working

Hello,

I’ve purchased the Elite version of Product Feed PRO for Woocommerce yesterday. I’ve added the GTINs and Brand to al of my products first and then when I’ve created the feed through your plugin I’ve selected in the field mapping for g:Brand and g:GTIN woosea brand and woosea gtin. However neither the gtin nor brand are appearing in the Product feed after the feed is generated (double checked it afterwards multiple times through change settings > field mapping and there both field mappings are correctly setup and I’ve multiple time manually refreshed the product feed but it’s still not in the feed these values). All of the other elements I’ve added appear, only the woosea ones not. What could be the reason for that?

Thank you very much in advance for you help.

The page I need help with: [log in to see the link]