How can I get more error details or logging, when an exception is thrown in a HotChocolate GraphQL server?

I’m building out a simple HotChocolate GraphQl server and HotChocolate throws an Unexpected Execution Error, but doesn't expose any information about the error, as soon as I post a request against it. It doesn't matter how I post the request against the backend (BananaCakePop, Postman, Insomnia, ...). The reponse looks like this:

{
  "errors": [
    {
      "message": "Unexpected Execution Error",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "pong"
      ]
    }
  ],
  "data": {
    "pong": null
  }
}

The request response contains no further information and nothing is logged to the applications console. What would be a reasonable next step to try and figure out what went wrong?