Item has no eligible Fulfillment Center as it is hazmat (hazardous material) so you can not send to FBA.
if you see something similar to this:
Error Details:
This operation may be partially successful, Please check the status. Reason: Invalid item for MSKU ZOLDROP3OZPEP-RYTXX with reason ITEM_WITH_NO_VALID_FC.
Amazon cannot find an appropriate fulfillment center for this product.
There is currently no fulfillment center in the destination country capable of receiving this product. Please delete this product from the shipment or contact Seller Support if you believe this is an error.
This means that the item is hazmat usually, and you can check it in Seller Central by trying to add it to a shipping plan. When you do, you will see a similar message to the one below:
