Fix errors in custom field rendering and administration

src/Bundle/ChillCustomFieldsBundle/Form/CustomFieldType.php

@@ -11,6 +11,7 @@ declare(strict_types=1);
 
 namespace Chill\CustomFieldsBundle\Form;
 
+use Chill\CustomFieldsBundle\Entity\CustomFieldsGroup;
 use Chill\CustomFieldsBundle\Form\DataTransformer\CustomFieldsGroupToIdTransformer;
 use Chill\CustomFieldsBundle\Service\CustomFieldProvider;
 use Chill\MainBundle\Form\Type\TranslatableStringFormType;
@@ -45,7 +46,7 @@ class CustomFieldType extends AbstractType
 
         if ('entity' === $options['group_widget']) {
             $builder->add('customFieldsGroup', EntityType::class, [
-                'class' => 'ChillCustomFieldsBundle:CustomFieldsGroup',
+                'class' => CustomFieldsGroup::class,
                 'choice_label' => fn ($g) => $this->translatableStringHelper->localize($g->getName()),
             ]);
         } elseif ('hidden' === $options['group_widget']) {