How to create an ACF shortcode with Repeater Field in WordPress? [duplicate]

I want to create a shortcode using ACF Repeater Field and so I’ve found this code and when I tried to apply it on my website it doesn’t work. Am using genesis frame work.

my aim is create a shortcode using ACF Repeater Field and display table in post or page.

Here is my code in functions.php:

    function menu_loop () { 

    echo    '<div class="entry-content dishes">';
// check if the repeater field has rows of data
        if( have_rows('menu_sections') ):

            // loop through the rows of data
            while ( have_rows('menu_sections') ) : the_row();

                // display a sub field value

                echo '<h2>' . get_sub_field('section_title') . '</h2>';
                if ( have_rows('sections_items'));?>

                    <table>

                        <thead>
                            <tr>
                                <td class="ja_name">Name</td>
                                <td class="ja_description">Description</td>
                                <td class="ja_price">Price</td>
                            </tr>
                        </thead>  

                    <?php while (have_rows('section_items') ): the_row(); ?>

                        <tr>
                            <td><?php the_sub_field('dish_names'); ?></td>
                            <td><?php the_sub_field('dish_description'); ?></td>
                            <td>$ <?php the_sub_field('dish_price'); ?></td>
                        </tr>

                    <?php endwhile;?>

                    </table> <?php 

            endwhile;

         else : 

            // no rows found

        endif; ?></div>
add_shortcode('testimonials', 'menu_loop');