> roboserver@1.0.0 server /usr/games/roboserver
> node ./bin/www

/usr/games/roboserver/public/js/SocketToAccountMap.js:4
class SocketToAccountMap {
^^^^^

SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
    at exports.runInThisContext (vm.js:53:16)
    at Module._compile (module.js:373:25)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Module.require (module.js:353:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/usr/games/roboserver/public/js/customizeServer.js:1:83)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)

npm ERR! Linux 4.10.1-2-pve
npm ERR! argv "/usr/bin/nodejs" "/usr/bin/npm" "run" "server"
npm ERR! node v4.8.4
npm ERR! npm  v2.15.11
npm ERR! code ELIFECYCLE
npm ERR! roboserver@1.0.0 server: `node ./bin/www`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the roboserver@1.0.0 server script 'node ./bin/www'.
npm ERR! This is most likely a problem with the roboserver package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node ./bin/www
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs roboserver
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!
npm ERR!     npm owner ls roboserver
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /usr/games/roboserver/npm-debug.log