This issue occurs when you use your generic Shopify domain (myshopify.com) as your primary domain.
Keeping the generic domain makes it difficult for our system to analyze, optimize, and then generate relevant search terms and keywords. This prevents it from activating some Google search campaigns as they might under-perform.
Adding a custom domain to your Shopify store should solve this problem. You can read more about adding domains at the Shopify Help Center: https://help.shopify.com/en/manual/domains
Please let us know once a custom domain is added so we can activate your additional campaigns on Google and offer you the full potential of AdScale.