Hello @clionas,
Thank you for sharing your question with the Klaviyo Community.
Can you confirm you are using your Magento coupons exclusively in flow email sends and not campaign email sends? I ask because dynamic coupon codes for Magento 2 are not currently available when sending campaign emails. If you attempt to use a Magento 2 coupon in a campaign email, you may see this error for skipped coupons. This is because sending unique coupon codes in a campaign would require generating thousands of codes per second and Klaviyo cannot guarantee a specific Magento server's rate-limiting settings will not impact the generation of dynamic coupons at this volume and velocity.
If you are seeing this error for a flow email, I would double-check that you have properly configured the coupon rule information according to our guide for using Magento 2 coupons in Klaviyo.
Thanks for being a member of our Community and have a wonderful day.
Thank you DD, thats exactly the problem. I was trying to use an auto granerated coupon in a campaign email rather than a flow email.
THANK YOU