diff --git a/app/Helpers/Admin/Mapurl_helper.php b/app/Helpers/Admin/Mapurl_helper.php
index c18a0e6..6f3b7da 100644
--- a/app/Helpers/Admin/Mapurl_helper.php
+++ b/app/Helpers/Admin/Mapurl_helper.php
@@ -65,7 +65,7 @@ function getFieldIndex_Row_MapurlHelper($field, array $row, array $fieldFilters,
       break;
     case 'updated_at':
     case 'created_at':
-      return str_split($row[$field], 10)[0];
+      return is_null($row[$field]) ? "" : str_split($row[$field], 10)[0];
       break;
     default:
       if (in_array($field, $fieldFilters)) {