The file upload encountered a problem

We are trying to post inline images within body content(reference). First we have to upload images to the album, but we are getting response as {"code":100,"message":"The file upload encountered a problem."}. As part of params i am sending them in Multipartentitybuilder(java) [builder.addPart("image.upload",file) here file is the ByteArrayBody]. Please help me what is the missing content here.

Thanks in advance for your help consuming the community v1 image upload api!