Uploading a file in an empty directory

[GhadaFullStack]

Hello,
Empty directories throws exception when listing them but i found a workaround to solve the issue and i posted it in issue #10.
But now i'm facing a new bug, i can't upload a file in an empty directory it returns always an error (The app doesn't crash) and when i upload the same file to another filled directory every thing goes fine. I'm using the same code of upload from the documentation.
Can you please try to find out the problem ?