Error 500 (Internal Error) when creating Markdown Sale via Marketing API

[nakashim-0]

Hello eBay Developer Support,

I'm experiencing a persistent internal server error (HTTP 500) when using the Marketing API to create a Markdown Sale.

• API Endpoint:
  POST :item_price_markdown
• Response:
  {
  "errors": [
  {
  "errorId": 2003,
  "message": "Internal error",
  "longMessage": "There was a problem with an eBay internal system or process."
  }
  ]
  }
• Correlation ID: Not provided (N/A)
• Marketplace: EBAY_US
• Occurrence: Consistent despite retries and waiting periods.

Could you please investigate this issue?

Thank you.