Page Navigation Dosen't Work :(

Hi
I just start to design my own theme and I tested everything on localhost and everything was fine, but after that I uploaded my theme to my host I just installed one more plugin which is “Hide My Wp” so the limit for index posts is 12. now when I want to get to next page it’ll return to same page which is index also I’m not using any plugins to make page nav I use this:

Functions.php

function bittersweet_pagination() {

global $wp_query;

$big = 999999999; // need an unlikely integer

$pages = paginate_links( array(
        'base' => str_replace( $big, '%#%', esc_url( get_pagenum_link( $big ) ) ),
        'format' => '?paged=%#%',
        'current' => max( 1, get_query_var('paged') ),
		'prev_next'    => True,
        'prev_text'    => __('<i class="fa fa-chevron-left"></i>'),
        'next_text'    => __('<i class="fa fa-chevron-right"></i>'),
        'total' => $wp_query->max_num_pages,
        'type'  => 'array',
    ) );
    if( is_array( $pages ) ) {
        $paged = ( get_query_var('paged') == 0 ) ? 1 : get_query_var('paged');
        echo '<div class="text-center" style="direction:ltr"><ul class="pagination pagination">';
        foreach ( $pages as $page ) {
                echo "<li>$page</li>";
        }
       echo '</ul></div>';
        }
}

Index.php:
<?php bittersweet_pagination(); ?>

I tested this too on xampp and worked fine but now it doesn’t work
https://www.animeio.com