Ember: Cannot read property 'modelName' of undefined

We are using ember 1.13.5, ember-data 1.13.7 and sails 0.11 for the backend.

The full error is: Cannot read property 'modelName' of undefined at ember$data$lib$system$store$$Service.extend.serializerFor

I followed the code through dev-tools and came to the code shown in the image below. It shows that modelName is defined.

This is the actually code that is being called in my setup.js controller:

_this.store.query('business-account', {user: user.get('id')})
      .then(function(businessAccount) {
        debugger;
      }, function(err) {
        debugger;
      });

The above throws the following error:

TypeError: Cannot read property 'modelName' of undefined
at ember$data$lib$system$store$$Service.extend.serializerFor (http://ift.tt/1haAyVr)
at http://ift.tt/1haAvZC
at http://ift.tt/1OF57x1
at Map.forEach.cb (http://ift.tt/1OF55Fl)
at OrderedSet.forEach (http://ift.tt/1OF55Fn)
at Map.forEach (http://ift.tt/1haAyVu)
at Function.ember$data$lib$system$model$$default.reopenClass.eachRelationship (http://ift.tt/1OF55Fp)
at DS.default.RESTSerializer.extend._extractEmbeddedRecords (http://ift.tt/1haAyVy)
at DS.default.RESTSerializer.extend.normalize (http://ift.tt/1OF55Fr)
at apply (http://ift.tt/1haAvZL)