How can I solve this error?
0 MenuItem cannot be cast to WindowMenuItem
XojoFramework$7076
RuntimeCheckCast
wRegion.wRegion.Event_EnableMenuItems%%o<wRegion.wRegion>
XojoFramework$9478
enableMenuItems
XojoFramework$875
XojoFramework$881
-[NSMenu _populateFromDelegateWithEventRef:]
-[NSMenu _populateWithEventRef:]
-[NSCarbonMenuImpl _carbonPopulateEvent:handlerCallRef:]
NSSLMMenuEventHandler
_Z22_InvokeEventHandlerUPPP25OpaqueEventHandlerCallRefP14OpaqueEventRefPvPFlS0_S2_S3_E
_ZL23DispatchEventToHandlersP14EventTargetRecP14OpaqueEventRefP14HandlerCallRec
_ZL30SendEventToEventTargetInternalP14OpaqueEventRefP20OpaqueEventTargetRefP14HandlerCallRec
SendEventToEventTargetWithOptions
_Z16SendMenuPopulateP8MenuDataP20OpaqueEventTargetRefmdmP14OpaqueEventRefPh
_ZL12PopulateMenuP8MenuDataP20OpaqueEventTargetRefP13CheckMenuDatamd
_ZL21Check1MenuForKeyEventP8MenuDataP13CheckMenuData
_ZL21CheckMenusForKeyEventP8MenuDataP13CheckMenuData
_Z15_IsMenuKeyEventP8MenuDataP14OpaqueEventRefmPS0_Pt
IsMenuKeyEvent
+[NSCarbonMenuImpl _menuItemWithKeyEquivalentMatchingEventRef:inMenu:]
_NSFindMenuItemMatchingCommandKeyEvent
_NSHandleCarbonMenuEvent
_DPSNextEvent
-[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
XojoFramework$1241
XojoFramework$1242
Delegate.Invoke%%
Application._CallFunctionWithExceptionHandling%%op
XojoFramework$9536
XojoFramework$1241
-[NSApplication run]
XojoFramework$9538
RuntimeRun
REALbasic._RuntimeRun
_Main
main
start