At the moment there are problems with uploading and with uploaded subtitles.
Sometimes uploading just doesn't work at all and one of these errors show:
"saving to tmp failed"
or
"Cant open file, write to webmaster please: upload(storage:comp)"
Sometimes the uploading seems to have worked well, but when using the preview feature or actually trying to download, this error shows:
"1912345678 subtitle file doesnt exists, you can contact admin GetSubtitleContents()"
(with "1912345678" being any 10-digit number).
This problem started last night (Wednesday May 24th) roughly around 00:00 AM GMT.
We are working on a fix.