Site not installed

Greetings to you

Can anyone , here, tell me why the following website is no longer working?
I have tried to surf it several times  during the the last few weeks, but in vain. I suppose that his/her owner is a member of this group.

http://publications-jeunesse-20eme-siecle.fr/

It says the same thing to me : "site not installed".
I couldn't tell what's this about 

Hi Youcef! How are you?

I can only confirm that I get the very same message in return and I suggest that you take a look at the following website:

https://docs.ovh.com/gb/en/hosting/web_hosting_error_-_website_not_installed/

which will perhaps make sense to you?

Thanks a lot  Monsieur X  and Paxson

It seems that the owner of this website has disabled it. I hope that Admin-Serge  have an idea about what happened.