Issue: Lightning Container loading a jquery fileupload widget as a static resource - throws "403 Forbidden" error in container.js

Plain iframe works
    <iframe src="/resource/jqfileupload/fileupload/index.html"></iframe>
Same static resource fails in lightning container with 403    
    <lightning:container src="{!$Resource.jqfileupload + '/fileupload/index.html'}"/>

Any help is greatly appreciated. Thanks!