Page Navigation not working only on index

hello i have created a new website with magazon theme and i had to create an static page for my home website. the problem is that the page navigation on the home page does not work and it works only in catories ecc

this is the index.html code:

<?php
do_action('st_theme_init');
get_header(); ?>
<div class="main-outer-wrapper mt30">
    <div class="main-wrapper container">
        <div class="row row-wrapper">
            <div class="page-wrapper twelve columns b0">
                <div class="row">
                    <?php
                       $default_layout  =  intval(st_get_setting("layout",3));
                       if(is_singular()):
                            global $post;
                            $st_page_builder = get_page_builder_options($post->ID);
                            $layout = intval($st_page_builder['layout']);
                            if(in_array($layout,array(1,2,3,4))){
                               $default_layout = $layout  ;
                            }
                        endif;
                        do_action('st_before_layout');
                       // $file  = ST_TEMPLATE_DIR.'/layout/'.st_get_layout($default_layout).'.php';
                      //  include($file);
                       get_template_part('st-framework/templates/layout/'.st_get_layout($default_layout),'');
                        do_action('st_after_layout');
                     ?>

                 </div>
            </div>
        </div>
        <div class="clear"></div>
    </div>
</div> <!-- END .main-outer-wrapper -->
<?php
get_footer();

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