error unlock g950f msl

i have this problem any solution

Operation: Unlock
Selected model: SM-G950F
Software version: 34.3

Searching Samsung modem detected COM35
Reading phone info
Model SM-G950F
AP version G950FXXU3CRGH
CSC version G950FOXM3CRGH
CP version G950FXXU3CRGH
Product code XEU
Phone SN RF8J52H6DLP
IMEI: 359038080382416
Unique number CE0517150C96B04C0D
Reading IMEI OK
IMEI: 359038080382416
Reading SN error (1)