I think the same error happen "AttributeError in on_menu_file_active()" in bug 831679, Bug 824326, Bug 823241, Bug 839034, Bug 837524, Bug 823628.
I think the same error happen "AttributeError in on_menu_ file_active( )" in bug 831679, Bug 824326, Bug 823241, Bug 839034, Bug 837524, Bug 823628.