MAGETWO-54357: Product Preview doesn't work

Author: irenelagno

app/code/Magento/Catalog/Ui/DataProvider/Product/Form/Modifier/Websites.php

@@ -122,6 +122,7 @@ public function modifyMeta(array $meta)
                                     'collapsible' => true,
                                     'componentType' => Form\Fieldset::NAME,
                                     'dataScope' => self::DATA_SCOPE_PRODUCT,
+                                    'disabled' => false,
                                     'sortOrder' => $this->getNextGroupSortOrder(
                                         $meta,
                                         'search-engine-optimization',