publishOffer in sandbox results in "A system error has occurred" error

[nom687]

When I run publishOffer in a sandbox environment, the following error occurs and publishing fails.

I'd like to place a test order, but can't I do that in the sandbox?

```

{
  "errors": [
    {
      "errorId": 25001,
      "domain": "API_INVENTORY",
      "subdomain": "Selling",
      "category": "Request",
      "message": "A system error has occurred. Sorry, error is encountered when creating your item."
    }
  ]
}

```