Advanced Sessions Joining not working

The print string is always outputting 0.
Behind the Join Session Advanced is just a get (0) and a join session.

first of all, u should connect print string to “on success” and “on failure”, in order to not always getting 0

second of all if u using, inside unreal client and server simulator,
go to editor setting and disable connect automatically

It looks like it just

cant find the other server. I “redesinged” my advanced sessions, and now its printing nothing