Failed to parse SourceMap

i am using meteor with angular and using angular ui-router i have an error in my console
" Failed to parse SourceMap " some one can help me please my code is there

(app.js)

      angular.module('forum', ['angular-meteor', 'ui.router'])
    .config(function($urlRouterProvider, $stateProvider){

        // Set the default route
        $urlRouterProvider
            .when('/', '/topics')
            .otherwise('/topics');

        // Add states
        $stateProvider.state('topic', {
            url: '/topic/:topicId',
            templateUrl: 'views/pages/topic.html',
            controller: 'TopicContoller'
        });

    })
    .run(function($state){




        // We inject $state here to initialize ui.router
    })
    .controller('TopicContoller', function($scope, $stateParams){
        $scope.subscribe('topic', function(){ return [$stateParams.topicId]; });
        $scope.helpers({
            topic: function() {
                return Topics.find({_id: $stateParams.topicId});
            }
        });
    })

topics.html

         <div class="page">
        <h1>{{ topic.name }}</h1>
          </div>

Same here. And my stylus files arent mapped - meteor just dumbs all css into one big css fileā€¦ ((