Followup to: Issue #3050128 by Pancho: Fix regression in FillPdfRedirectAction

src/Plugin/FillPdfActionPlugin/FillPdfRedirectAction.php

@@ -25,10 +25,13 @@ class FillPdfRedirectAction extends FillPdfSaveAction {
    * @return \Symfony\Component\HttpFoundation\RedirectResponse
    *   Redirects user to the generated PDF file, or if saving the file fails,
    *   to the front page.
+   *
+   * @todo Replace file_create_url() by File::createFileUrl() once we're not
+   *   supporting Drupal 8.6 anymore.
    */
   public function execute() {
     $saved_file = $this->savePdf();
-    $url = ($saved_file !== FALSE) ? $saved_file->createFileUrl() : Url::fromRoute('<front>')->toString();
+    $url = ($saved_file !== FALSE) ? file_create_url($saved_file->getFileUri()) : Url::fromRoute('<front>')->toString();
     return new RedirectResponse($url);
   }