when trying to push a build (as a update to a game) I get this error. butler: error: unexpected jamesmgd/samhainophobia:win

This is what I'm trying to type in the command prompt "butler push E:\Samhainophobia\Samhainophobia 1.0.1\Samhainophobia.zip jamesmgd/samhainophobia:win" I've been following a video on YouTube and I have no idea what issue it could be. 

Thanks in advanced for any answers.