Sticky category menu not working anymore

Hello.

After an update to the newest WordPress version my sticky category menu is not working anymore. I have made a child theme, where I added the following code to functions.php to make the category menu sticky with scroll.

Can you guys see why it is not working?

/* Make the section "Kategorier" sticky on scroll  */
function woodmart_sticky_header_categories(){
    $template = '
        <div class="whb-sticky-header whb-clone whb-main-header">
            <div class="<%cloneClass%>">
                <div class="container">
                    <div class="whb-flex-row whb-general-header-inner">
                        <div class="whb-column whb-col-left whb-visible-lg">
                            <%.header-categories-nav%>
                        </div>
                        <div class="whb-column whb-col-center whb-visible-lg">
                            <%.main-nav%>
                        </div>
                        <div class="whb-column whb-col-right whb-visible-lg">
                            <%.woodmart-header-links%>
                            <%.search-button%>
                            <%.whb-wishlist-icon%>
                            <%.woodmart-shopping-cart%>
                        </div>
                        <%.whb-mobile-left%>
                        <%.whb-mobile-center%>
                        <%.whb-mobile-right%>
                    </div>
                </div>
            </div>
        </div>
    '; 
    return $template;
}