build app can't work (Sencha Cmd v5.0.3.324)

I am a newer in SenchaTouch.

I'v created a project with sencha, and it runs well in local.

Then I want to release it to my webserver, so I build it with this command: "sencha app build production", and build success.

I put the build folder to my server, but it doesn't work, shows the following error: "Uncaught TypeError: Cannot read property 'getIdProperty' of undefined".

And I found this error happened when called function store.load(). getIdProperty function may invoke in class Reader extractData function.

Ext.define('Ext.data.reader.Reader', {

... other codes...

extractData : function(root) {

var me = this,

records = [],

length = root.length,

model = me.getModel(),

idProperty = model.getIdProperty(),

fieldsCollection = model.getFields(),

node, i, data, id, clientId;

... other codes...

}

after "model = me.getModel()", the model is null so it will be error when invoke model.getIdProperty()

Is there someone get the same problem?

build app can't work (Sencha Cmd v5.0.3.324)