Chatgpt Actions to interact with Dropbox

The /2/files/download Dropbox API endpoint is a "content-download" style endpoint and so takes its parameters in a header, and does not expect any data in the request body. The error indicates that your network client is sending data in the request body, so the Dropbox server is rejecting the call.

To address this, you'll need to make sure your client is not sending any data in the request body. As your client is not made by Dropbox though, we can't offer specific guidance on how to configure that, so you may need to refer to its documentation for information on how to configure it accordingly.