I am trying to add CanFulfillIntentRequest to my app and when I enter the manual JSON to test it I get the message "Error submitting Manual JSON The input was incompatible."
To me this would indicate that somehow what I am not giving it is not formatted correctly. But I copied it directly from the example test on: https://developer.amazon.com/docs/custom-skills/implement-canfulfillintentrequest-for-name-free-interaction.html#create-the-json-for-testing-your-skill
I have also tried using the alexa simulator and copying the input JSON from there and no matter what I input, I get that same message. Is there something broken with Manual JSON input? I haven't found anyone else posting that they even get this message.