Missing Files Via FTP

What does this mean?

When uploading using FTP (WinSCP, FileZilla etc), some files may disappear. The easiest identifier of a missing file is the server console warning it could not find certain files. This error will show up right when you start the resource. If you are unsure if you are missing any files, simply restart the resource and the console will let you know.

How do I fix this?

Simply reupload the missing file by itself and place it into the correct folder.