> I have tried to install it on the ReadyNas via server settings, Plugins,
> Third party plugins, tick against Spotify Protocol Handler, apply.
> Restart when prompted. Wait for 5 minutes, refresh screen, go to
> Plugins... SPH is not installed, still in 3rd party plugins. Am I
> missing something?

This is off-topic here. Please join the discussion about SPH in its own
thread. Unless you're trying to run it on a Sparc based ReadyNAS (NV,
Duo v1). That's not supported.