It seems that somehow (I believe because of an FTP connection issue that somehow corrupted the whole domain) all my files have been deleted.
I’m not sure if there’s version control or anything similar, so I have no idea if this is even repairable.
There have been cases where the file manager had a display issue, and it showed that there were no files when they actually were there. So you may want to check it with an FTP client like FileZilla as well to verify.
But if your files are actually gone, then I’m sorry to say they are really gone. There is no version control, not trash folder and no backups. What you see on your account are the files we have.