How to correctly package your project for unreal marketplace?

Hi Guys I need to know how to package an ue4 project for the unreal marketplace, my feedback says: Content folder contains a single pack folder named after the project: FAIL. “Please add a master folder named after your project with all other projects inside”.

I have my project files from documents/unrealprojects/my project zipped into a .rar file and uploaded to dropbox, the .rar file contains the folder with my project name and has the project files in it.
Can somebody tell me what I have done wrong there?

got in contact with someone at unreal, folder should be set up like this myprojectfolder → myprojectfolder ->my project content, should be the way its set up