--- a/entityreference_view_widget.module	2019-09-10 11:21:54.011361000 +0300
+++ b/entityreference_view_widget.module	2019-09-11 09:36:20.847199000 +0300
@@ -361,14 +361,7 @@
   form_set_value($element, $input, $form_state);
 
   if ($settings['instance']['required'] && empty($valid)) {
-    if (isset($form_existing['#field_parents']) && empty($form_existing['#field_parents'])) {
-      form_set_error($settings['element'], t('@f field is required.', array('@f' => $settings['instance']['label'])));
-    }
-    else {
-      // Modules utilizing #field_parents like Inline Entity Form
-      // requires different sort of form error.
-      form_error($element, t('@f field is required.', array('@f' => $settings['instance']['label'])));
-    }
+    form_error($element, t('@f field is required.', array('@f' => $settings['instance']['label'])));
   }
 }