g925f v5.1.1 write cert fail / error

g925f v5.1.1 write cert fail / error
any ideal / solution?
thanks

Operation: Write CERT
Selected model: SM-G925F
Software version: 23.9

Waiting ADB device… OK
Reading phone info…
Model: SM-G925F
Android version: 5.1.1
Product code:
Phone version: G925FXXU2BOGE
PDA version: G925FXXU2BOGB
CSC version: G925FTSI2BOG8
CSC country code: Ireland
CSC sales code: TSI
HW version:
Phone S/N: 00000000000
Modem board: SHANNON333
RF cal date:
IMEI:
Checking Super user right… true
Initialization AT RIL… error
Done with Samsung Tool PRO v.23.9