Error on search results page

i use checkbox filter codes from here https://www.relevanssi.com/knowledge-base/category-filter-search-results-pages/

created short code with code

function custom_category_dropdown() {
ob_start();
rlv_category_dropdown();
return ob_get_clean();
}
add_shortcode(‘category_dropdown’, ‘custom_category_dropdown’);

paste it on search results elementor template.

error on search results

Warning: Invalid argument supplied for foreach() in …code-snippets/php/snippet-ops.php(581) : eval()’d code on line 10

line 10 is

    foreach ( $rlv_categories_present as $cat_id => $cat_name ) {

it seems like no index for categoies or you say. in settings enable for shure

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