WCMS-3507: fix when menu links are not routed

src/Service/UWService.php

@@ -556,7 +556,10 @@ class UWService implements UWServiceInterface {
 
       // If we hit the home link, set it and break
       // out of the loop.
-      if ($item['url']->getRouteName() == '<front>') {
+      if (
+        $item['url']->isRouted() &&
+        $item['url']->getRouteName() == '<front>'
+      ) {
         $home_link = $item['title'];
         break;
       }