Fix indexing

Author: iherak

bundle/Core/FieldType/RemoteMedia/SearchField.php

@@ -25,7 +25,7 @@ public function getIndexData(Field $field, FieldDefinition $fieldDefinition)
         return [
             new Search\Field(
                 'value',
-                $field->value->data['url'],
+                $field->value->data['url'] ?? null,
                 new StringField(),
             ),
         ];