updated advanced pack to 3.12.0:

Reports:

    Non-aggregated columns in Grid report export.
    Normalized table mode for 2-dimensional Grid reports.
    Ability to create internal reports via the UI.
    Ability to show/hide and resize columns in the list report result view.

custom/Espo/Modules/Advanced/Tools/Report/JointGridExecutor.php

@@ -11,7 +11,7 @@
  * usage to the software or any modified version or derivative work of the software
  * created by or for you.
  *
- * Copyright (C) 2015-2025 EspoCRM, Inc.
+ * Copyright (C) 2015-2026 EspoCRM, Inc.
  *
  * License ID: 19bc86a68a7bb01f458cb391d43a9212
  ************************************************************************************/
@@ -297,7 +297,7 @@ class JointGridExecutor
                     $result->setSums($sums);
                 }
 
-                foreach (($subReportResult->getColumnNameMap() ?? []) as $key => $name) {
+                foreach ($subReportResult->getColumnNameMap() as $key => $name) {
                     $map = $result->getColumnNameMap();
                     $map[$key] = $name;
                     $result->setColumnNameMap($map);