Mine doesn't even see the server. Just says unable to connect when I try from my iPad Air Plex app.
I can connect from my Android app on my Moto X but it will only allow me to stream music. If I try to stream any video files, I get an error saying Oops there's been an issue followed by an error saying it can't play the file.
I've opened port 32400 on my router successfully and also tried to disable my Synology firewall completely but no luck.