Thanks a lot, i didn’t know about the log thing, it is helping me to solve another issue where the game crashes when compiled on windows but now i know from where the trouble is coming (and i also feel like a hacker 
).
However, the first “tick” i can find is before the game is opened on a session, it says :
Bringing world “bla bla bla” (max tick rate 0 )
The second one, after opening on a session says
Bringing world “bla bla bla” (max tick rate 60 )
but i have set in the defaultEngine.ini tick rate to 50 (to test if it is the same value and it seems like it isn’t)
I didn’t find any server tick rate 
I hope it can help us.