max-query-depth: 10 configuration causing errors

[Jojoooo1]

Describe the bug
Set graphql.servlet.max-query-depth: 10

To Reproduce
Steps to reproduce the behavior:

1. Go to application.yaml set graphql.servlet.max-query-depth: 10
2. Go to /playground
3. Open developer console: "ServerParseError: JSON.parse: unexpected end of data at line 1 column 1 of the JSON data"

Expected behavior
Playground should be working

Desktop (please complete the following information):

• Browser: Firefox
• Version: 87.0 (64-bit)

[oliemansm]

I just tried this in an example project using the latest versions and I'm not getting those JSON parse errors. Instead I'm seeing in the console (expected) errors about max query depth being reached:

middleware.js:98 Uncaught Error: {
  "errors": [
    {
      "message": "maximum query depth exceeded 13 > 10",
      "extensions": {
        "classification": "ExecutionAborted"
      }
    }
  ],
  "data": null
}
    at Object.next (middleware.js:98)
    at b (middleware.js:98)
    at E (middleware.js:98)
    at e.value (middleware.js:98)
    at middleware.js:124

So from my point of view this is working as expected. Sounds like there's a specific problem with your local configuration instead. I'll convert this into a Discussion.