Fix layout builder page wasn't working anymore

src/TranslationInheritance.php

@@ -15,27 +15,27 @@ class TranslationInheritance implements TranslationInheritanceInterface, Trusted
   /**
    * Shows a message on the layout builder page if the translation is inherited.
    */
-  public static function alterLayoutBuilder(): void {
+  public static function alterLayoutBuilder($element) {
     $request = \Drupal::request();
     if (!$entity_type_id = $request->attributes->get('entity_type_id')) {
-      return;
+      return $element;
     }
 
     $entity = $request->attributes->get($entity_type_id);
     if (!$entity instanceof ContentEntityInterface) {
-      return;
+      return $element;
     }
 
 
     // The entity has to have the field for this to be applicable.
     if (!$entity->hasField(static::FIELD_NAME)) {
-      return;
+      return $element;
     }
 
     // If this is the default translation, or this translation simply doesn't
     // inherit from any other language, we instantly return.
     if (!$entity->get(TranslationInheritanceInterface::FIELD_NAME)->source_language) {
-      return;
+      return $element;
     }
 
     // Translation inheritance can be recursive, make sure to get the actual
@@ -51,6 +51,8 @@ To edit that content, please <a href=":link">click here</a>.', [
       '@source' => $language->getId(),
       ':link' => $url->toString(),
     ]));
+
+    return $element;
   }
 
   /**