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/Resources/metadata/clientDefs/ReportPanel.json

@@ -50,5 +50,17 @@
             }
         }
     },
-    "searchPanelDisabled": true
-}
+    "searchPanelDisabled": true,
+    "relationshipPanels": {
+        "report": {
+            "selectMandatoryAttributeList": [
+                "internalClassName",
+                "columnsData",
+                "groupBy",
+                "columns",
+                "type",
+                "entityType"
+            ]
+        }
+    }
+}