Fixed bug: attribute distinct fetchAll

server/src/Action/AttributeDistinctAction.php

@@ -83,7 +83,7 @@ final class AttributeDistinctAction extends AbstractAction
 
             // Execute query and returns response
             $stmt = $queryBuilder->execute();
-            $rows = $stmt->fetchAll(PDO::FETCH_COLUMN, 0);
+            $rows = $stmt->fetchAll(PDO::FETCH_COLUMN);
             $payload = json_encode($rows);
         }