The reason why this or similar orders got rejected by Amazon
Issue:
The orders are rejected in the app due to " Seller is blocked or suspended from selling in the target marketplace" this usually happens when Amazon seller central account is deactivated due to non-payment of subscription or some other reason at seller. As a result, our app couldn't send this order to Amazon FBA for its fulfillment.
Resolution:
Since seller is blocked or suspended, kindly check and review under Amazon FBA if MCF orders can be created there or not. With current issue you should not be allowed to create orders there too.
So, you must reach out to Amazon seller support team now to resolve the issue for you.
Once re-activated you can re-authorize the connection between our app and Amazon FBA too.