GetListingItem -> Summaries -> ItemName not required

[salyangoz]

Problem description:

Hello, for getListingItem function sometimes summaries -> itemName is returning null. So we think that this field is not need to be required instead it needs to be optional. I know it's weird for Amazon not return itemName, but for this log error we know that ietm name can be nullable.

Error:

# ArgumentCountError: SellingPartnerApi\Seller\ListingsItemsV20210801\Dto\ItemSummaryByMarketplace::__construct(): Argument #5 ($itemName) not passed

Code

return $service->getListingsItem(
            $sellerId,
            $sku,
            [$this->getMarketplaceId()],
            null,
            ['summaries,attributes,issues,offers,fulfillmentAvailability']
        )->dto();

Seller Central SP API config page screenshot

itemName is not returning example
Response
{ "sku": "xxx", "summaries": [ { "marketplaceId": "xxx", "asin": "xx", "productType": "PRODUCT", "conditionType": "new_new", "status": [ "DISCOVERABLE" ], "createdDate": "2023-02-02T11:40:55.495Z", "lastUpdatedDate": "2023-11-25T07:54:48.062Z" } ] }

[gwharton]

Also experiencing this. I have 2 items that refuse to return itemName in the summaries section. Interestingly if I look at the item in the Inventory page on seller central, the Title of the product is missing the link to view it on amazon.

As soon as you call ->dto() on the response object everything bugs out as itemName is required.

I'm wondering if it will pick up the item_name attribute eventually and amazon start populating the itemName summaries field on its own and the problem will go away.

Edit : in my case it is broken on both searchListingsItems and getListingsItem calls.