Page list [http://localhost:8000/en/admin/cms/page/] url lists the items with invalid anchor url
It is not critical, as it will be used only in development settings. But it might confuse the newbies, when they are trying out.
i don't understand the issue... could you explain more?
In the settings.py, add the following config
TEMPLATE_STRING_IF_INVALID = 'INVALID EXPRESSION: %s'
Now, check the admin page for "pages" and click on a particular page_item
This also breaks the 'Page' menu link in the front-end.