Extending bread-crumbs component fails

[JamesWilmot]

Currently trying to extend the bread-crumbs component from the add-on with the following:

import Ember from 'ember';
import Breadcrumbs from 'ember-crumbly/components/bread-crumbs';

export default Breadcrumbs.extend({
});

And I get this assertion failure:

[ember-crumbly] Could not find a current route

Is there something really simple and easy which I'm missing?

Thanks for this really useful add-on!