diff -u b/core/modules/system/src/Controller/ThemeController.php b/core/modules/system/src/Controller/ThemeController.php
--- b/core/modules/system/src/Controller/ThemeController.php
+++ b/core/modules/system/src/Controller/ThemeController.php
@@ -48,7 +48,7 @@
   public function __construct(ThemeHandlerInterface $theme_handler, RouteBuilderInterface $route_builder, ConfigFactoryInterface $config_factory) {
     $this->themeHandler = $theme_handler;
     $this->configFactory = $config_factory;
-    $this->$route_builder = $route_builder;
+    $this->route_builder = $route_builder;
   }
 
   /**
only in patch2:
unchanged:
--- a/core/modules/content_translation/content_translation.admin.inc
+++ b/core/modules/content_translation/content_translation.admin.inc
@@ -295,7 +295,7 @@ function content_translation_form_language_content_settings_submit(array $form,
 
   // Ensure entity and menu router information are correctly rebuilt.
   \Drupal::entityManager()->clearCachedDefinitions();
-  \Drupal::service('router.builder_indicator')->setRebuildNeeded();
+  \Drupal::service('router.builder')->setRebuildNeeded();
 
   // If an entity type is not translatable all its bundles and fields must be
   // marked as non-translatable. Similarly, if a bundle is made non-translatable