Snapcast plugin install

I have the plugin installed on two other units, but I just built a new one to stream to with a HiFiBerry Amp and i cant get the plugin to install regardless of what i do.

i get the error below doing it via CLI, if i try to use the web interface it just sits at 30% and never moves.

/bin/mv: cannot create regular file ‘/tmp/plugins/’: Permission denied
throw err;

Error: Command failed: /bin/mv *.zip /tmp/plugins/
/bin/mv: cannot create regular file ‘/tmp/plugins/’: Permission denied

at checkExecSyncError (child_process.js:601:13)
at execSync (child_process.js:641:13)
at install (/volumio/pluginhelper.js:688:9)
at Object.<anonymous> (/volumio/pluginhelper.js:749:9)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)
at Function.Module.runMain (module.js:693:10)

Plugin installed successfully!

Got it working, for some reason I had to redo setup then it worked.