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VMahaVMaha 

Create a Lightning App using Custom Components-Trailhead challenge

Hi,

While completing  Trail Head Challenge for Lightning App using Custom Components ,when i am opening Lightning App  'MyData'  geting below error for first time only and then it goes to My data Screen but Lightning component ContactsToday is  not geting displayed 

Trailhead Error
James LoghryJames Loghry
Looks like something is wrong with your component.  Could you post the bundle (component, controller, helper, renderer, etc), and the lightning app?  Use the code format (< >) button when doing so too.

If you want to try to debug it yourself, a good way is to start with a bare bones component, and add piece by piece in, to narrow down where the error is occuring.