I have one song I love but I cannot upload it and I don't see a way to manually set mp3s for my server. Or maybe just allow me to drop mp3s in my server folder >_>

Are you getting disconnected from the server with a packet size error when trying to upload it? I was having an issue where I would get kicked from the server due to packet size when trying to create a playlist and was able to resolve it by adding this a packet fixer mod to increase the packet size limit.

I don't remember the context this is a legacy issue.