Error: Did not check() all arguments during publisher 'movies.list'

[vonwao]

I tried to combine Mantra with Nova. But I'm getting this error below. Any ideas? (Sorry for so many questions, I'm still learning a lot about how Meteor works!)

You can see the code here:
https://github.com/vonwao/react-nova-mantra-kickstart

and the relevant files:
https://github.com/vonwao/react-nova-mantra-kickstart/blob/v0.2.1/lib/nova-demo.js
https://github.com/vonwao/react-nova-mantra-kickstart/blob/v0.2.1/client/modules/nova-demo/demo-component.jsx

Exception from sub movies.list id 4oZXTErK9MnBTzHpy Error: Did not check() all arguments during publisher 'movies.list'
I20160302-19:02:34.810(-5)? at [object Object]._.extend.throwUnlessAllArgumentsHaveBeenChecked (packages/check/match.js:411:1)
I20160302-19:02:34.810(-5)? at Object.Match._failIfArgumentsAreNotAllChecked (packages/check/match.js:106:1)
I20160302-19:02:34.810(-5)? at maybeAuditArgumentChecks (packages/ddp-server/livedata_server.js:1695:18)
I20160302-19:02:34.810(-5)? at Subscription._runHandler (packages/ddp-server/livedata_server.js:1023:17)
I20160302-19:02:34.810(-5)? at Subscription.MeteorX.Subscription._runHandler (packages/meteorhacks_unblock/packages/meteorhacks_unblock.js:55:1)