Issue #3018544 by jigish.addweb, bobhacker, RenatoG: Notice : Undefined index:...

Issue #3018544 by jigish.addweb, bobhacker, RenatoG: Notice : Undefined index: #entity_type dans Drupal\colorbox\Plugin\Field\FieldFormatter\ColorboxFormatter->settingsForm()

src/Plugin/Field/FieldFormatter/ColorboxFormatter.php

@@ -194,7 +194,7 @@ class ColorboxFormatter extends ImageFormatterBase implements ContainerFactoryPl
 
       $entity_type = '';
 
-      if (!empty($form['#entity_type'])) {
+      if (isset($form['#entity_type'] ) && !empty($form['#entity_type'])) {
         $entity_type = $form['#entity_type'];
       }
 
@@ -252,7 +252,7 @@ class ColorboxFormatter extends ImageFormatterBase implements ContainerFactoryPl
 
       $entity_type = '';
 
-      if (!empty($form['#entity_type'])) {
+      if (isset($form['#entity_type']) && !empty($form['#entity_type'])) {
         $entity_type = $form['#entity_type'];
       }