Quote from yangjihong: “Firmware Version: J-Link V11 compiled Apr 27 2041 16:36:21 ... Unable to connect the cjtag,It's too hard. ” J-Link firmware is very old... It is in reality from 2021... It needs to be updated to a new version...The year 2041 on your screenshot is fake... It's a cracked firmware... P.S. Version HW v11.0 - also cracked...Serial number from J-Link BASE v10.1