TypeError: path.existsSync is not a function

[jonalxh]

Hi, I'm trying to run this example, but when I execute in terminal: juggernaut it responds: /usr/lib/node_modules/juggernaut/lib/juggernaut/server.js:12 if (path.existsSync(keysPath + "/privatekey.pem") && path.existsSync(keysPath + "/certificate.pem")) { ^ TypeError: path.existsSync is not a function at Object.<anonymous> (/usr/lib/node_modules/juggernaut/lib/juggernaut/server.js:12:10) at Module._compile (module.js:541:32) at Object.Module._extensions..js (module.js:550:10) at Module.load (module.js:458:32) at tryModuleLoad (module.js:417:12) at Function.Module._load (module.js:409:3) at Module.require (module.js:468:17) at require (internal/module.js:20:19) at Object.<anonymous> (/usr/lib/node_modules/juggernaut/lib/juggernaut/index.js:4:15) at Module._compile (module.js:541:32)

Do you know how to solve it?

Thanks a lot