Internal 500 error when prettying JSON response about talkback HOT 3 CLOSED

$ curl --header "content-type:application/json" localhost:3002/todos/1 -I

HTTP/1.1 500 Internal Server Error
Date: Fri, 01 Feb 2019 17:19:33 GMT
Connection: keep-alive

curl -i -X GET \
  http://localhost:3002/todos/1 \
  -H 'Content-Type: application/json' \
  -d '{
        "Hello": "Hello"
}'

HTTP/1.1 500 Internal Server Error
Date: Fri, 01 Feb 2019 17:35:15 GMT
Connection: keep-alive
Content-Length: 0