Fix error admin

README.md

   
 - Instalation ckeditor
   `php bin/console ckeditor:install`
-  `php bin/console assets:install public`
+  `php bin/console assets:install public
+- Créer la config fos_ckeditor.yaml
+  ```
+  fos_ck_editor:
+    input_sync: true
+    default_config: base_config
+    configs:
+        base_config:
+            filebrowserBrowseRoute: file_manager
+            filebrowserBrowseRouteParameters:
+                    conf: default
+                    module: ckeditor
+            format_tags: 'p;h2;h3'
+            toolbar:
+                - { name: "styles", items: ['Bold', 'Italic','Underline', 'Strike']}
+                - { name: "paragraph", items: ['Format', 'NumberedList', 'BulletedList', '-', 'Outdent', 'Indent', '-', 'Blockquote'] }
+                - { name: "link", items: [ 'Link', 'Unlink'] }
+                - {name: 'insert', items: [ 'Image' ]}
+                - {name: 'document', items: [ 'Source' ]}
+        simple_config:
+            toolbar:
+                - { items: ['Bold', 'Italic', 'Underline', 'Colors', 'Source'] }
+twig:
+form_themes:
+- '@FOSCKEditor/Form/ckeditor_widget.html.twig'
+
+
+   ```
+- Créer la config artgris_file_manager.yaml
+```
+artgris_file_manager:
+    conf:
+        default:
+            dir: "../public/uploads"
+            type: 'image'
+```
+
   
   
 - Enjoy !

Resources/views/crud/field/image.html.twig

 {# @var field \EasyCorp\Bundle\EasyAdminBundle\Dto\FieldDto #}
 {# @var entity \EasyCorp\Bundle\EasyAdminBundle\Dto\EntityDto #}
 {% set html_id = 'ea-lightbox-' ~ field.uniqueId %}
+{% if field.value is not null %}
 <a href="#" class="ea-lightbox-thumbnail" title="{{ field.value.legend }}" data-featherlight="#{{ html_id }}" data-featherlight-close-on-click="anywhere">
     <img src="{{ asset(field.value.image) }}" class="img-fluid">
 </a>
 <div id="{{ html_id }}" class="ea-lightbox">
     <img src="{{ asset(field.value.image) }}">
 </div>
+{% endif %}