Session is invalid

Hello, when i find a session My session is invalid the function “Session.IsValid()” return false.

I have debug the function and that result :

This function is on OnlineSessionSettings.h > FOnlineSessionSearchResult. I don’t find reason for why “Session.SessionInfo->IsValid()” return false.

I have try create my session in blueprint with default function but i have same problem.

For my project i use Steam OnlineSubSystem but i create lan session for test in local (on same PC with 2 instance of the game).

When i use 2 computer that is work, probably beceause the steam is not initialized on a second instance on my PC)