Hi! Thank you for the response.
The code I pasted is the response from the server showing that it does not understand the mime-type. As this is working flawlessly using cURL or Postman I do not see any reason to suspect any error on the server side.
I’m afraid I don’t have the skills to set up a server to listen to incoming request. The server I’m trying to upload to is a large e-commerce platform.
Looking at your screen shots I can’t spot anything that differs besides “form-data” but as you say that shouldn’t make any difference. No sure how I could present more details as the HTTP Request activity basically only contains the Endpoint, Attachment and credentials. Not much to do wrong I suppose.