diff --git a/core/modules/views/src/Plugin/EntityReferenceSelection/ViewsSelection.php b/core/modules/views/src/Plugin/EntityReferenceSelection/ViewsSelection.php
index ae59751..c1f3489 100644
--- a/core/modules/views/src/Plugin/EntityReferenceSelection/ViewsSelection.php
+++ b/core/modules/views/src/Plugin/EntityReferenceSelection/ViewsSelection.php
@@ -147,8 +147,8 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
       if ($this->currentUser->hasPermission('administer views') && $this->moduleHandler->moduleExists('views_ui')) {
         $form['view']['no_view_help'] = array(
           '#markup' => '<p>' . $this->t('No eligible views were found. <a href="@create">Create a view</a> with an <em>Entity Reference</em> display, or add such a display to an <a href="@existing">existing view</a>.', array(
-            '@create' => Url::fromRoute('views_ui.add'),
-            '@existing' => Url::fromRoute('entity.view.collection'),
+            '@create' => Url::fromRoute('views_ui.add')->toString(),
+            '@existing' => Url::fromRoute('entity.view.collection')->toString(),
           )) . '</p>',
         );
       }