I have discovered this issue is related to the scheduling, not the schema. If you select to run on a schedule then the UI doesn't allow for it since there is no date field to determine the scheduling. However, if you choose to run 'Once' then it works. If anyone else finds a better work around pleas...

Thanks Manoj! I watched the video and this made sense. I tried again using that approach. I created a separate schema for Order Line Items called Shopify Products and link it with the Shopify Order Schema. However, I received the same message when I attempted to create the target dataset in AEP for ...

I have successfully connected AEP to Shopify using the sources within AEP. I have established 2 connections. One for the Orders table and another for the Customer table. Since the Order table doesn't contain any of the products within the order, I needed to include the Shopify.Order_Line_Items table...