Thank you for help. My problem was that in my calculations (that was on server) was used variable that I change on client. I made this variable as Replicated, but again it didn’t work. So, new question: property replicates only from server to client and not vice versa?
Btw, how UE_LOG should work? I defined log, I even tried LogTemp (build-in name), but I can’t see any messages - not on the screen and console (~).