urls that won't go into sites - no matter what

Has this come up?   I keep coming across urls that won't go into sites, no matter what version I put in.  Right now I am trying to get this url into a D7.0.9 site:

https://www.cofounderslab.com/

I have tried with just "http:"  - with and without the "www" and with just the root - no matter what it won't go in.  Does anyone know the cause of this?   Is there a fix?

I don't know the sites script.  You could try inserting it directly into the database; backing up the database first of course in case of an oops.

That url doesn't work in 7.1.4 either