Error message with longer inputs

Using an API call, when I input a shorter prompt, I don’t get the following error. I do get the error when I input a longer prompt. I’ve increased the tokens so the figure is far above my input length. Know what the solution is? Here’s the error:

The service Name-of-my-API-call just returned an error (HTTP 400). Please consult their documentation to ensure your call is setup properly. Raw error:

"error": {
"message": "We could not parse the JSON body of your request. (HINT: This likely means you aren't using your HTTP library correctly. The OpenAI API expects a JSON payload, but what was sent was not valid JSON. If you have trouble figuring out how to fix this, please send an email to and include any relevant code you'd like help with.)",
"type": "invalid_request_error",
"param": null,
"code": null

Is it over 2,000 tokens in total?

Weird it would show a JSON error message for the larger one, though…

Good luck.