Ember JS Rails Backend IE error processing route No Transport

My ember js cli app is running on heroku and connecting to a rails 3.1 api using the ActiveModelAdapter. It seems to be running as expected in Chrome, Firefox, & Safari but displays a blank page for Internet Exporer 9,10,11 but works fine in IE Edge.

In the console I get the error:

Error while processing route:home.index No Transport

I am accessing a different domain for the API, is this a CORS related issue?

Seems like this post may have some relationship: Ember supporting XDomainRequest(xdr) for CORS