imp: do not redirect anonymous user after user edit save

dsr_portal.module

@@ -65,5 +65,7 @@ function dsr_portal_form_user_form_alter(&$form, &$form_state) {
  * Redirect users to their profile pages when submitting the edit form.
  */
 function dsr_portal_user_edit_form_submit($form, &$form_state) {
-  $form_state->setRedirect('entity.user.canonical', ['user' => \Drupal::currentUser()->id()]);
+  if (!\Drupal::currentUser()->isAnonymous()) {
+    $form_state->setRedirect('entity.user.canonical', ['user' => \Drupal::currentUser()->id()]);
+  }
 }