My email is verified but I'm having the same error. I made a small edit to my game (Ren'py) and I deleted the old files on the game page to upload the updated ones. This is not the first time I've done this, but when I did this today it failed to upload and said "There was a problem completing your upload." I attempted this three times, even did a new build the third time, but nothing changed. It may be an internet connection error, a Ren'py update error, a site error, or something else.