Hello @juliemarie,
Please share a screenshot of the product settings page, what are the product information you provided in the backend settings?
This error may occur due to the product being restricted to purchase from WooCommerce or the price, type, or any other required information is not added while creating the product.
Solution!
Now, if you are getting the same error message on the WooCommerce Checkout page, then edit that product and check if all the necessary options are filled. Such as Name, price, and Subscription information if the product is a subscription product.
If any one information is missing then add that information and update the product and try purchasing the same product from the default WooCommerce’s checkout page.
Once the product is purchased from the default WooCommerce’s checkout page then it can be purchased from the CartFlows page too without any issues.`