Page not found (404)

Request Method: GET
Request URL: https://www.nipfp.org.in/blog/author/external/
Raised by: feincms.views.Handler

Not found (extra_path u'/author/external/' on <Page: Blog>)

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.