it should work like this
#include <Ethernet2.h>
#include <Websockets.h>
the #define W5500_H_INCLUDED is in Ethernet2 library in w5500.h
it should work like this
#include <Ethernet2.h>
#include <Websockets.h>
the #define W5500_H_INCLUDED is in Ethernet2 library in w5500.h