error message when starting :sudo node server.js

[Pazuzo]

Could you advice plese:

/home/hermes/pisignage-server/node_modules/socket.io/lib/store.js:35
Store.prototype.proto = EventEmitter.prototype;
^

TypeError: Cannot read property 'prototype' of undefined
at Object. (/home/hermes/pisignage-server/node_modules/socket.io/lib/store.js:35:41)
at Module._compile (module.js:571:32)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:488:32)
at tryModuleLoad (module.js:447:12)
at Function.Module._load (module.js:439:3)
at Module.require (module.js:498:17)
at require (internal/module.js:20:19)
at Object. (/home/hermes/pisignage-server/node_modules/socket.io/lib/manager.js:16:13)
at Module._compile (module.js:571:32)

[colloqi]

What is the node version? we prefer node 4.x

[Pazuzo]

Thank you, thats solve the issue