The root menu item for the iommi admin was broken if you inherited from Admin
@@ -151,7 +151,7 @@ class Meta:
menu = Menu(
sub_menu=dict(
- root=MenuItem(url=lambda **_: reverse(Admin.all_models), display_name=gettext('iommi administration')),
+ root=MenuItem(url=lambda admin, **_: reverse(admin.__class__.all_models), display_name=gettext('iommi administration')),
change_password=MenuItem(url=lambda **_: reverse(Auth.change_password), display_name=gettext('Change password')),
logout=MenuItem(url=lambda **_: reverse(Auth.logout), display_name=gettext('Logout')),
),
