As near as I can tell, following lines should clear up most, if not all, of those errors:
#include "../Sockets/Public/SocketSubsystem.h"
#include "../Networking/Public/Interfaces/IPv4/IPv4Address.h"
#include "../Sockets/Public/IPAddress.h"
I am not too sure how those files related to EngineKismetLibraryClasses.h
, though.