MAGETWO-48516: Most of category fields don't have Use Default Value option in Store/StoreView scope on the redesigned category page

Author: shiftedreality

app/code/Magento/Catalog/Model/Category/DataProvider.php

@@ -176,8 +176,13 @@ public function getMeta()
     {
         $meta = parent::getMeta();
         $meta = $this->prepareMeta($meta);
-        $meta = $this->addUseDefaultValueCheckbox($this->getCurrentCategory(), $meta);
-        $meta = $this->resolveParentInheritance($this->getCurrentCategory(), $meta);
+
+        $category = $this->getCurrentCategory();
+
+        if ($category) {
+            $meta = $this->addUseDefaultValueCheckbox($category, $meta);
+            $meta = $this->resolveParentInheritance($category, $meta);
+        }
 
         return $meta;
     }