samsung s6 edge plus unlockk error

Gathering phone info…
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-G928F
Sales Code: XEU
Country Code: UK & IRE
Timezone: Europe/London
Android Version: 5.1.1 [LMY47X]
Build Date: Mon Dec 7 16:12:45 KST 2015
PDA Version: G928FXXU2AOL2 [december 2015, rev2]
Phone Version: G928FXXU2AOL2 [december 2015, rev2]
CSC Version: G928FXEU2AOL1 [december 2015, rev1]
Board Platform: EXYNOS5
Modem Platform: SHANNON333
Serial Number: R38G902SAKP
Imei: 352720079593874
Battery Status: 3.82V (30%)
Network Type: GSM
SIM Status: READY
Knox Version: v30
Warranty Bit: 0

Unlocking…
Reading and storing secure image. Be patient! Do NOT disconnect the phone!
Checking secure image.
Preparing.
Calculating. Be patient! Do NOT disconnect the phone!
Unable to unlock.
Finished at local time: [01.29.16 20:19:30]
WorkID: 9042053