Avertissement Event

Dears,
I have a trouble here in my JomSocial app.

This message is displaying in the "event view" :

Avertissement
Sorry, we cannot find the specified event.

I really don't understand what it's happening...

The page seem to be displayed in the wrong directory, other than URL "/component/community" =>
not displaying: got the advertisment message:
http://www.domain.com/index.php/component/community/events/viewevent/1-week-end?Itemid=213

The right issue is to display the page with the first URL, but it's not.

Is there someone here to help me? I can not find other discussions about this error.

Thanks!

Below here is the image of the message:

Let me know with a reply once you add the login.