Hi,

Try following:

Open your theme functions.php file and at the bottom add:

add_action('stec_after_html', function() {
    ?>
    <script type="text/javascript">
        (function ($) {
            var triggered = false;
            $.stecExtend(function (m) {
                if (m.glob.options.view === 'agenda' && false === triggered) {
                    m.$instance.find('.stec-layout-agenda-events-all-list .stec-layout-event').first().trigger(m.helper.clickHandle());
                    triggered = true;
                }
            }, 'onLayoutSet');
        })(window.jQuery);
    </script>
    <?php
});