Can't load form to create new instance of model - ember.js

Question

router.js has
Router.map(function() {
this.route('concepts');
this.route('create-concept', { path: '/concepts/new' });
this.route('concept', { path: '/concepts/:id' });
});
controllers/create-concept.js has
import Ember from 'ember';
export default Ember.Controller.extend({
actions: {
create: function() {
var concept = this.store.createRecord('concept', {
description: this.get('description').trim()
});
this.set('description', '');
concept.save();
}
}
});
templates/create-concept.js has
{{textarea value="description"}}
{{action 'create'}}
routes/create-concept.js is just the default
import Ember from 'ember';
export default Ember.Route.extend({
});
When I go to the URL /concepts/new in my browser, however, I just get the error
Uncaught TypeError: Cannot read property 'getAttribute' of undefined
in my browser. I have no idea what the cause of this generic error would be, and documentation on this seems to be pretty sparse...
EDIT -- when I am visiting /concepts and click on a link to /concepts/new, it shows
Preparing to transition from 'concepts' to ' create-concept'
Transitioned into 'create-concept'
so it would appear that it does find the correct route
Since it's hard to copy and paste this for some reason, here's a screenshot of part of the stack trace:
EDIT 2 -- Minimal code demonstrating problem

Answer 1

I don't think you really want value="description", you probably mean value=description
One assigns the literal string description to the value property, the other binds the property description to the value property.
Your action needs to actually be attached to something! A div, button, anchor tag.
<div {{action 'create'}}>blah</div>
<button {{action 'create'}}>blah</button>
http://guides.emberjs.com/v1.10.0/templates/actions/