Minor addition

djangocms_blog/cms_menus.py

@@ -126,9 +126,12 @@ class BlogNavModifier(Modifier):
             namespace = resolve(request.path).namespace
             config = app.get_config(namespace)
         try:
-            if config and config.menu_structure != MENU_TYPE_CATEGORIES:
+            if config and (
+                    not isinstance(config, BlogConfig) or
+                    config.menu_structure != MENU_TYPE_CATEGORIES
+            ):
                 return nodes
-        except AttributeError:
+        except AttributeError:  # pragma: no cover
             # in case `menu_structure` is not present in config
             return nodes
         if post_cut:

tests/test_utils/admin.py

@@ -9,7 +9,6 @@ from .models import CustomUser
 class CustomUserAdmin(UserAdmin):
     model = CustomUser
 
-
     fieldsets = (
         (None, {'fields': ('username', 'password')}),
         (_('Personal info'), {'fields': ('first_name', 'last_name', 'email')}),