sendOfferToInterestedBuyers Response is not JSON data error about sdk-ebay-rest-negotiation HOT 1 OPEN

use GuzzleHttp\Client;

public function __construct(string $ebay_account_name)
    {
        $this->apiConfig   = $this->getEbayToken($ebay_account_name);
        $this->apiInstance = new OfferApi(
            new Client(),
            Configuration::getDefaultConfiguration()->setAccessToken($this->apiConfig->token)
        );
    }

public function sendOfferToInterestedBuyers(int $itemid): apiError|SendOfferToInterestedBuyersCollectionResponse
    {
        $offeredItem = new OfferedItem();
        $offeredItem->setListingId($itemid);
        $offeredItem->setQuantity(1);
        $offeredItem->setDiscountPercentage(config('discount.percent'));
        $offeredItems[] = $offeredItem;

        $createdOfferRequests = new CreateOffersRequest();
        $createdOfferRequests->setMessage(sprintf(config('discount.text'), config('discount.percent'), config('discount.duration.value')));
        $createdOfferRequests->setAllowCounterOffer(false);
        $createdOfferRequests->setOfferDuration(
            new TimeDuration(
                [
                    'unit'  => config('discount.duration.unit'),
                    'value' => (string)config('discount.duration.value')
                ]
            )
        );
        $createdOfferRequests->setOfferedItems($offeredItems);

        try {
            return $this->apiInstance->sendOfferToInterestedBuyers($this->apiConfig->marketplace, $createdOfferRequests);
        } catch (ApiException $e) {
            Log::error($e->getResponseBody());
            return $this->parseErrors($e->getResponseBody());
        }
    }