n920t ph2

I’m trying to write a cert into this note 5 phone is rooted I also tried with combination firmware. I keep getting error when trying to reset msl, any advice?

Gathering phone info…
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-N920T
Sales Code: TMB
Timezone: America/New_York
Android Version: 5.1.1 [LMY47X]
Build Date: Tue Aug 30 15:04:44 KST 2016
PDA Version: FA51_N920TUVU4APH2
Phone Version: N920TUVS4DPH2 [august 2016, rev2]
Board Platform: EXYNOS5
Modem Platform: SHANNON333
Imei: 35375707023702
Battery Status: 4.21V (75%)
Network Type: GSM
Knox Version: v00
Warranty Bit: 1

Reseting MSL…
Please unlock screen if closed.
Trying on SAMSUNG Mobile USB Modem (COM93)
Processing. Be patient! Do NOT disconnect the phone!
Write cert failed.
Unable to reset MSL.
Finished at local time: [11.12.16 12:28:28]
WorkID: 15004718