Error while running sample code bot-trees

[nanda248]

I'm trying to run this bot-trees on my Ubuntu OS 17.04(Virtualbox). I got no error during npm install and I got the following error during npm start.
`> bot-trees@1.0.0 start /home/nanda/Documents/test_bot/bot-trees-master

node index.js

module.js:471
throw err;
^

Error: Cannot find module './Common'
at Function.Module._resolveFilename (module.js:469:15)
at Function.Module._load (module.js:417:25)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)
at Object. (/home/nanda/Documents/test_bot/bot-trees-master/node_modules/bot-graph-dialog/lib/Node.js:2:16)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)

npm ERR! Linux 4.10.0-26-generic
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "start"
npm ERR! node v6.10.3
npm ERR! npm v3.10.10
npm ERR! code ELIFECYCLE
npm ERR! bot-trees@1.0.0 start: node index.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the bot-trees@1.0.0 start script 'node index.js'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the bot-trees package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node index.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs bot-trees
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls bot-trees
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! /home/nanda/Documents/test_bot/bot-trees-master/npm-debug.log
`

There is no issue when i run it on my windows 10. The error only exists on my Ubuntu OS.