Notice: Undefined index: #type a bootstrap_barrio_preprocess_form_element_label()

The commit 08a3b93 has debug code.

+/**
+ * Implements hook_preprocess_HOOK() for form-element-label.html.twig.
+ */
+function bootstrap_barrio_preprocess_form_element_label(&$variables) {
+  $element = $variables['element'];
+  print_r($element['#type']);
+}
+

Needs to remove: print_r($element['#type']); from dev branch.