Having one toggle open at time across several accordions

try in your child-theme functions.php:

function ava_custom_toggle_behavior(){
?>
<script type="text/javascript">
(function($) {
    $(window).on('load', function() {
        $('.toggler').on('click', function() {
            var $current = $(this);
            
            // Short delay so Enfold can set its own classes
            setTimeout(function() {
                if ($current.hasClass('activeTitle')) {
                    // Find all other togglers on the page that are active
                    $('.toggler').not($current).each(function() {
                        if ($(this).hasClass('activeTitle')) {
                            // Simulate click or remove classes manually
                            $(this).trigger('click');
                        }
                    });
                }
            }, 100);
        });
    });
})(jQuery);
</script>
<?php
}
add_action('wp_footer', 'ava_custom_toggle_behavior');