Cannot read property '2' of null

framework7.bundle.js show error for following code.
HTML =>

    <div class="navbar navbar-transparent">

        <div class="navbar-bg"></div>

        <div class="navbar-inner sliding">

            <div class="title">Driver Authentication</div>

        </div>

    </div>

    <div class="toolbar tabbar toolbar-bottom">

        <div class="toolbar-inner">

            <a href="/" class="tab-link" data-route-tab-id="tab1">Driver</a>

            <a href="/tab2/" class="tab-link" data-route-tab-id="tab2">Vehicle</a>

        </div>

    </div>

    <div class="tabs tabs-routable">

        <div class="tab page-content" id="tab1"></div>

        <div class="tab page-content" id="tab2"></div>

    </div>

</div>

route.js =>

{

        path: '/Driver-Authentication/',

        componentUrl: './pages/driver-authentication.html',

        // DRIVER AND VEHICLE TABS

        tabs: [

            {

                path: '/',

                id:'tab1',

                content: ' \

                <div class="block"> \

                  <p>Tab 1 content</p> \

                  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Ullam enim quia molestiae facilis laudantium voluptates obcaecati officia cum, sit libero commodi. Ratione illo suscipit temporibus sequi iure ad laboriosam accusamus?</p> \

                  <p>Saepe explicabo voluptas ducimus provident, doloremque quo totam molestias! Suscipit blanditiis eaque exercitationem praesentium reprehenderit, fuga accusamus possimus sed, sint facilis ratione quod, qui dignissimos voluptas! Aliquam rerum consequuntur deleniti.</p> \

                  <p>Totam reprehenderit amet commodi ipsum nam provident doloremque possimus odio itaque, est animi culpa modi consequatur reiciendis corporis libero laudantium sed eveniet unde delectus a maiores nihil dolores? Natus, perferendis.</p> \

                </div> \

                ',              

                // componentUrl: './pages/tabs/driver.html'

            },

            {

                path:'/tab2/',

                id:'tab2',

                content: ' \

                <div class="block"> \

                  <p>Tab 1 content</p> \

                  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Ullam enim quia molestiae facilis laudantium voluptates obcaecati officia cum, sit libero commodi. Ratione illo suscipit temporibus sequi iure ad laboriosam accusamus?</p> \

                  <p>Saepe explicabo voluptas ducimus provident, doloremque quo totam molestias! Suscipit blanditiis eaque exercitationem praesentium reprehenderit, fuga accusamus possimus sed, sint facilis ratione quod, qui dignissimos voluptas! Aliquam rerum consequuntur deleniti.</p> \

                  <p>Totam reprehenderit amet commodi ipsum nam provident doloremque possimus odio itaque, est animi culpa modi consequatur reiciendis corporis libero laudantium sed eveniet unde delectus a maiores nihil dolores? Natus, perferendis.</p> \

                </div> \

                ',

                // componentUrl:'./pages/tabs/vehicle.html'

            },

        ],

    },

INDEX.JS =>

$$('#btnAut').on('click',function(e){

    app.view.main.router.navigate('/Driver-Authentication/');

  });