Error while trying to create fulfillmentPolicy

[dam-185464]

I'm trying to create a new fulfillment policy to return my policyID which I can later assign in CreateOffer method. 

Everyting was made with help of this article: https://developer.ebay.com/api-docs/sell/account/resources/fulfillment_policy/methods/createFulfillm...

All test are made using Postman 

I'm using production environment and it's currently looking like this.

I've opted user into business program 

POST https://api.ebay.com/sell/account/v1/fulfillment_policy

I included Content-Type : application/json and Authorization Bearer <AccessToken> in Headers

Token was created with https://api.ebay.com/oauth/api_scope/sell.account scope included

Request payload in body 

{

    "categoryTypes": [

        {

            "name": "ALL_EXCLUDING_MOTORS_VEHICLES"

        }

    ],

    "marketplaceId": "EBAY_PL",

    "name": "AAA",

    "handlingTime": {

        "unit": "DAY",

        "value": "1"

    },

    "shippingOptions": [

        {

            "costType": "FLAT_RATE",

            "optionType": "DOMESTIC",

            "shippingServices": [

                {

                    "freeShipping": "false",

                    "shippingCarrierCode": "UPS",

                    "shippingCost": {

                        "currency": "PLN",

                        "value": "20"

                    }

                }

            ]

        },

        {

            "costType": "CALCULATED",

            "optionType": "INTERNATIONAL",

            "shippingServices": [

                {

                    "freeShipping": "false",

                    "shippingCarrierCode": "UPS",

                    "shipToLocations": {

                        "regionIncluded": [

                            {

                                "regionName": "Worldwide"

                            }

                        ]

                    }

                }

            ]

        }

    ]

}

Response i receive

HTTP status code: 500 Internal Server Error
{

    "errors": [

        {

            "errorId": 20500,

            "domain": "API_ACCOUNT",

            "category": "APPLICATION",

            "message": "System error."

        }

    ]

}


When trying to create or get PaymentPolicy or ReturnPolicy everyting works fine. What's going on with FulfillmentPolicy?