Ember.js application gives TypeError in production only

I'm building an ember-cli application that will use an API build with Django/DRF. I'm using the ember-django-adapter also.

When I run my API at localhost:8000 and run the ember app at localhost:4200, it works.

I have the following in my config/environment.js:

if (environment === 'production') {
  ENV.APP.API_HOST = 'http://ift.tt/13NK49N';
  ENV.APP.API_NAMESPACE = '';
}

When I do a production build of the ember application, and deploy it to Travis, the page does not load, and I get the following error in the console:

Uncaught TypeError: Attempting to register an unknown factory: `transform:date`

I'm baffled by this. There is a date in the model that the main route uses, but the key confusion is that this doesn't happen in development. Is there some other step that I need to get an ember app in s3 to connect to an external API?

If using CORS with Django in my API, and have the following in my settings.py:

CORS_ORIGIN_ALLOW_ALL = False

CORS_ORIGIN_WHITELIST = (
    'localhost:4200',
    'mybucket.s3-website-us-east-1.amazonaws.com'
)

CORS_ALLOW_HEADERS = (
    'x-requested-with',
    'content-type',
    'accept',
    'accept-encoding',
    'origin',
    'authorization',
    'x-csrftoken'
)
CORS_EXPOSE_HEADERS = (
    'Access-Control-Allow-Origin: *',
)

I appreciate any help.