Resolve undefined indexes in the scope form

src/Entity/Form/Oauth2ScopeForm.php

@@ -81,12 +81,12 @@ class Oauth2ScopeForm extends EntityForm {
         'status' => [
           '#type' => 'checkbox',
           '#title' => $grant_type_label,
-          '#default_value' => $grant_types[$grant_type_key]['status'],
+          '#default_value' => $grant_types[$grant_type_key]['status'] ?? FALSE,
         ],
         'description' => [
           '#type' => 'textfield',
           '#title' => $this->t('Description for %grant_type', ['%grant_type' => $grant_type_label]),
-          '#default_value' => $grant_types[$grant_type_key]['description'],
+          '#default_value' => $grant_types[$grant_type_key]['description'] ?? '',
           '#states' => [
             'visible' => [
               ':input[name="grant_types[' . $grant_type_key . '][status]"]' => ['checked' => TRUE],