diff -u b/core/profiles/demo_umami/themes/umami/templates/components/navigation/block--umami-main-menu.html.twig b/core/profiles/demo_umami/themes/umami/templates/components/navigation/block--umami-main-menu.html.twig
--- b/core/profiles/demo_umami/themes/umami/templates/components/navigation/block--umami-main-menu.html.twig
+++ b/core/profiles/demo_umami/themes/umami/templates/components/navigation/block--umami-main-menu.html.twig
@@ -41,7 +41,7 @@
 %}
 
 <div id="menu-main-toggle" class="menu-main-togglewrap">
-  <button type="button" name="menu_toggle" class="menu-main-toggle" data-drupal-selector="menu-main-toggle" aria-label="Main menu">{% include active_theme_path() ~ '/images/svg/menu-icon.svg' %}</button>
+  <button type="button" class="menu-main-toggle" data-drupal-selector="menu-main-toggle" aria-label="Main menu">{% include active_theme_path() ~ '/images/svg/menu-icon.svg' %}</button>
 </div>
 
 {% set heading_id = attributes.id ~ '-menu'|clean_id %}