Still I'm not able to upload my code. I'm in the edit mode. If I'm not wrong, "Add files" is the button used to upload my code. I browsed my code to be uploaded [ which is in zip format ], but there is a cursor which keeps on rotating next to the Upload files button. I noticed one more thing that, even if I just enter into the edit mode, the status next to the upload files button is just keep on rotating.