I use TCP only between master server and client. The server listens on 192.168.0.18…and client connects to 192.168.0.18 (or my public IP if I open ports)
Something strange! Can you show code of how you use tcp socket on the server? And yet one easy question, did you test ping from laptop to PC?
I need a website where I can put full code on, it’s only one class file lol.
proper simple, easy to read, if you’ve done C#
Ok, tomorrow I’ll see it.
Brother Yogi,
My friend didn’t open his port lmao, so his PC was blocking it.
All fixed 
@Moynzy - thank you for sharing that screenshot! This made me realize why I was getting a black screen in standalone mode. My issue was that I had a custom game instance in C++ where I had overriden StartGameInstance() without calling Super::StartGameInstance(). Adding that fixed the black screen for me!
Hope this helps someone.
@VSZ no problem, yeah, you always need to call the super method when you override methods. Very happy this helped, thank you for you thanking me!!