I could eventually connect... Try these steps... Delete the App and re-add it.Check if the email mentioned in Facebook Page is working.Shop Template is active on FB Page.FB Page with Shop is published.Go to Incognito Mode and login and start Shopify ...

The Facebook Button when clicked does nothing. Even the Terms and Conditions page is not opening. Cleared the Cache. Deleted reinstalled the APP.Isn't this the basic thing Shopify is supposed to do, when u have bought Shopify Lite for Facebook?