Added Facebook Shop to Shopify and products already appearing on Facebook Shop to be viewed by customers. But When i click the product to buy or view on the
'Checkout on Website" button i get the error below. Already approached Facebook Business Support and all their checks and investigations seem clear of any errors from their side so they suggested I take this up with Shopify which is what i'm doing.
Parameter Missing or Invalid: Required parameter missing or invalid: channel
Yes in fact I did find a way to solve this problem. I deleted my old Shopify Product Catalog located in your Commerce Manager and replaced it with exactly the same Catalog again. Thats it, and it’s working fine now. Just for the worse case, do make a back-up!
I hope this could help you out too.
Go to FB Business (business.facebook.com) and log-in to your account. In FB Business Suite, to go Commerce and find your Catalog. Be sure to get the latest version of your "products.csv" file from your Shopify Shop and export it into your local drive. Now go back to FB Business Suite, delete the Catalog there and replace it with the latest one you have just downloaded. This is how I got my FB Shop running again. Give it a try and maybe it will work for you, too. Somehow the csv file got corrupted and replacing it with exactly the same database worked for me.
Best regards from Cologne!