Global rate limiting error messages being incorrectly returned

[lleadbet]

Describe the bug

When using the global_rate_limit feature under router (see example config), the router returns:

{
  "error": {
    "message": "Unexpected token 'y', \"your reque\"... is not valid JSON",
    "stack": "SyntaxError: Unexpected token 'y', \"your reque\"... is not valid JSON"
  }
}

To Reproduce

With config having:

traffic_shaping:
  router:
    global_rate_limit:
      capacity: 1
      interval: 1s

And sending a number of requests in a row, you'll see the above issue.

Expected behavior

The error to be correctly shown.

Desktop (please complete the following information):

• OS: macOS
• Version v1.43.2