Question:
Please help me to fix this. I don't see any invalid component but still can't save.
Answer:
This is because the postback you used on the buttons has problems. The postback came from Old dashboard, where the domain was not whitelisted. Check the error below:
To fix this postback problem, simply whitelist the domain you used on that postback. We are highly suggesting that you stop using the eCommerce store from the Old dashboard.
Change all your eCommerce links on your Flows and postbacks to reflect the new dashboard Ecommerce links.