createFulfillmentPolicy returning error 2003

[erbe_9140]

Hi,

I am trying to create a fulfillment policy on my sandbox environment, but i am getting error 2003. Anyone has any idea how to fix it?

Here is the body:

{
  "categoryTypes": [  
   {
     "name": "ALL_EXCLUDING_MOTORS_VEHICLES"
   }
  ],
  "marketplaceId": "EBAY_US",
  "name": "Worldwide Shipping",
    "handlingTime": {
    "unit" : "DAY",
    "value" : 1
  }
}

And I am receiving the following error:

{
  "errors": [
    {
      "errorId": 2003,
      "domain": "ACCESS",
      "category": "APPLICATION",
      "message": "Internal error",
      "longMessage": "There was a problem with an eBay internal system or process. Contact eBay developer support for assistance"
    }
  ]
}