First of all, due to different pinout on Arduino Leonardo, we need to connect ENC28j60 module directly on ICSP interface, as shown above.
After that we need to assign correct pin for CS in Enc28J60Network.h, line called #define ENC28J60_CONTROL_CS 12
pin number 12 worked for me fine.
thats mostly it.
other problem that I’m facing that Leonardo has only 28kb of available flash, not enough space for my project.