Your Shopify settings are missing. Please do the following:
- Navigate to the product admin page. This is where you create, edit and remove your Shopify products. It should look something like this.
- While on the product admin page, open the extension settings and click on the cog icon next to Shopify.
- Click the "Refresh" button. This should make the extension automatically recognise your Shopify settings.
- Now go to whichever listing you want to copy to Shopify and click the on the listing. This should start copying the listing to your Shopify store.