Hi,
We are using Pre checkout url (_cart page url) . Url: https://{abc}.myshopify.com/cart/add?id={variantt_id}&quantity=1 This url is not pre filling the product and redirecting to blank cart page.
There are a few things that could be causing this issue. It is possible that the variant ID is incorrect, or that the quantity is set to 0. It is also possible that there is an issue with the shopify cart URL. If none of these solutions solve the issue, custom development may be necessary.
If custom development is needed please feel free to give me a call or email.
Number: (484)-340-7369
Email: ninooburton@gmail.com