@Page Dependency Injection ERROR

Howdy. I’ve decided to venture into #Ionic2 and have stumbled upon a error that has me scratching my head.

Here’s a Plunker of the code I’m working with:

EXCEPTION: Cannot resolve all parameters for GridPage(NavController, undefined). Make sure they all have valid type or annotations.

Not sure what’s causing the problem here.

Read and learn: http://blog.thoughtram.io/angular/2015/09/17/resolve-service-dependencies-in-angular-2.html