Error creating Sport Cards

I'm trying to create an inventory item using sport cards aspects but it is failing from like a week (it was working fine until last update).

I tried to do the same using API explorer examples (on the site) and same error

{
  "errors": [
    {
      "errorId": 25001,
      "domain": "API_INVENTORY",
      "subdomain": "Selling",
      "category": "REQUEST",
      "message": "A system error has occurred. Internal System Error"
    }
  ]
}

an example:
url:

https://api.sandbox.ebay.com/sell/inventory/v1/inventory_item/someSKU

body:

{
   "availability":{
      "shipToLocationAvailability":{
         "quantity":1
      }
   },
   "condition":"USED_EXCELLENT",
   "packageWeightAndSize":{
      "packageType":"LETTER",
      "weight":{
         "unit":"POUND",
         "value":10
      }
   },
   "product":{
      "aspects":{
         "Card Size":[
            "Booklet"
         ],
         "League":[
            "Basketball Champions League (BCL)"
         ],
         "Set":[
            "1986 Star Court Kings"
         ],
         "Player/Athlete":[
            "Adam Plutko"
         ],
         "Year Manufactured":[
            "2020"
         ],
         "Material":[
            "Aluminum"
         ],
         "Original/Licensed Reprint":[
            "Original"
         ],
         "Vintage":[
            "Yes"
         ],
         "California Prop 65 Warning":[
            "warni"
         ],
         "Card Thickness":[
            "35 Pt."
         ],
         "Sport":[
            "Basketball"
         ],
         "Type":[
            "Sports Trading Card"
         ],
         "Language":[
            "Basque"
         ],
         "Card Name":[
            "FOO"
         ],
         "Manufacturer":[
            "5FINITY"
         ],
         "Features":[
            "1st Edition",
            "Box Topper"
         ],
         "Team":[
            "Altoona Curve"
         ],
         "Season":[
            "1986"
         ],
         "Country/Region of Manufacture":[
            "Unknown"
         ]
      },
      "description":"i am selling a j f c. please buy",
      "title":"b"
   }
}

test user: testuser_marcosdy