When trying to perform the request to add files to the transaction in Postman, it fails with HTTP 400 Bad Request and the following details:
The passed parameters have an invalid value: "Missing content-type boundary"
'Content-Type': 'multipart/form-data' header from the request configuration is automatically set by the uploader.
Check the Headers tab. If the
'Content-Type': 'multipart/form-data' header is present there, please try disabling/removing it, so that the request will be as follows: