Cannot read property 'replace' of undefined Ember CLI project

I've opened up this project for this first time and tried to run it with ember serve I have seen a couple of answers on here regarding the same error and their solutions don't solve this problem.

None of the files in the stack trace point to any of the application source files. Can anyone shed any light?

Cannot read property 'replace' of undefined
TypeError: Cannot read property 'replace' of undefined
    at CoreObject.module.exports.massageVersionNumber (C:\Users\Adam Copley\Desktop\pop-two\node_modules\ember-welcome-page\index.js:110:19)
    at CoreObject.module.exports.included (C:\Users\Adam Copley\Desktop\pop-two\node_modules\ember-welcome-page\index.js:28:31)
    at CoreObject.superWrapper [as included] (C:\Users\Adam Copley\Desktop\pop-two\node_modules\ember-cli\node_modules\core-object\lib\assign-properties.js:32:18)
    at EmberApp.<anonymous> (C:\Users\Adam Copley\Desktop\pop-two\node_modules\ember-cli\lib\broccoli\ember-app.js:468:15)
    at Array.filter (native)
    at EmberApp._notifyAddonIncluded (C:\Users\Adam Copley\Desktop\pop-two\node_modules\ember-cli\lib\broccoli\ember-app.js:463:45)
    at new EmberApp (C:\Users\Adam Copley\Desktop\pop-two\node_modules\ember-cli\lib\broccoli\ember-app.js:138:8)
    at module.exports (C:\Users\Adam Copley\Desktop\pop-two\ember-cli-build.js:7:13)
    at CoreObject.module.exports.Task.extend.setupBroccoliBuilder (C:\Users\Adam Copley\Desktop\pop-two\node_modules\ember-cli\lib\models\builder.js:74:19)
    at CoreObject.module.exports.Task.extend.init (C:\Users\Adam Copley\Desktop\pop-two\node_modules\ember-cli\lib\models\builder.js:54:10)