Cannot read property 'stack' of undefined on both the gomix and github project for basic node

Cannot read property 'stack' of undefined on both the gomix and github project for basic node
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#1

I finished the Data viz beta certification and wanted to move on so I went on to the “Basic Node and Express” section.

I never tried gomix before but when I use the starter project I get a Cannot read property ‘stack’ of undefined and even if I input console.log(‘Hello World’) it won’t pass the test on the beta page.

I decided that gomix wasn’t worth spending time on so I moved on to the github repo, cloned it, ran ‘npm start’ and get the same Cannot read property ‘stack’ of undefined

Here is the full stack trace :

Hello World
TypeError: Cannot read property 'stack' of undefined
    at Object.setupBackgroundApp (/Users/Home/github/basic_node/node_modules/fcc-express-bground/index.js:149:31)
    at Object.<anonymous> (/Users/Home/github/basic_node/server.js:25:9)
    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.runMain (module.js:575:10)
    at run (bootstrap_node.js:352:7)
    at startup (bootstrap_node.js:144:9)
Node is listening on port 3000...

And to add to that, how am I supposed to check if I can pass the tests ? Make a github page and put the url into the “yourapp.com” field in the challenge ?