JomSocial ActiveGURU ActivePublisher ActiveAdAgency ActiveiSEO ActiveSocialize Active
Hi
Chat option is in Jomsocial 4.5
Please install Jomsocial and inbox will work as chat.
If you want to use chat bar this option is in the 4.5.1 beta 2 version and enable chat plugin from plugin manager, you can test this on localhost first,
as beta version not recommended for live sites.
PS : please post the question in the English language, I am not able to understand your native language :)