Critical bug On5 Tmobile

To any team member please check with the On5 G550T on QC4 version when trying to unlock gives out error and bricks the phone have to reflash to make it work again, used another tool and unlocks it just fine without errors. Below is the log:

[ 3/10/2018 1:29:00 PM ] Operation: Unlock
[ 3/10/2018 1:29:00 PM ] Selected model: SM-G550T
[ 3/10/2018 1:29:00 PM ] Software version: 30.9
[ 3/10/2018 1:29:00 PM ]
[ 3/10/2018 1:29:00 PM ] Waiting ADB device...
[ 3/10/2018 1:29:00 PM ] Please, allow USB debugging on phone... OK
[ 3/10/2018 1:29:00 PM ] Reading phone info...
[ 3/10/2018 1:29:00 PM ] Model: SM-G550T
[ 3/10/2018 1:29:00 PM ] Android version: 6.0.1
[ 3/10/2018 1:29:00 PM ] Product code: SM2G550TZKATMB
[ 3/10/2018 1:29:00 PM ] Phone version: G550TUVU2AQC4
[ 3/10/2018 1:29:00 PM ] PDA version: G550TUVU2AQC4
[ 3/10/2018 1:29:00 PM ] CSC version: G550TTMB2AQC4
[ 3/10/2018 1:29:00 PM ] CSC country code: USA
[ 3/10/2018 1:29:00 PM ] CSC sales code: TMB
[ 3/10/2018 1:29:00 PM ] HW version: REV0.4
[ 3/10/2018 1:29:00 PM ] Phone SN: RV8H70RDHCK
[ 3/10/2018 1:29:00 PM ] Chip name: EXYNOS3475
[ 3/10/2018 1:29:00 PM ] Modem board: SHANNON308
[ 3/10/2018 1:29:00 PM ] Security patch: 2017-03-01
[ 3/10/2018 1:29:00 PM ] RF cal date: 20160712
[ 3/10/2018 1:29:00 PM ] IMEI: 358XXXXXXXXXXXX
[ 3/10/2018 1:29:00 PM ] Checking Super user right... true
[ 3/10/2018 1:29:00 PM ] Reading NV data... OK
[ 3/10/2018 1:29:00 PM ] Checking NV data... OK
[ 3/10/2018 1:29:00 PM ] Reading data... OK
[ 3/10/2018 1:29:00 PM ] Detecting MODEM... OK
[ 3/10/2018 1:29:00 PM ] Reading MODEM... OK
[ 3/10/2018 1:29:00 PM ] Calculating... OK
[ 3/10/2018 1:29:00 PM ] Initialization data... OK
[ 3/10/2018 1:29:00 PM ] Writing zTool... OK
[ 3/10/2018 1:29:00 PM ] Initialization zTool... OK
[ 3/10/2018 1:29:00 PM ] Running zTool, please wait...
[ 3/10/2018 1:29:00 PM ] Start... OK
[ 3/10/2018 1:30:00 PM ] Initialization... OK
[ 3/10/2018 1:30:00 PM ] Generate and check client proof... OK
[ 3/10/2018 1:30:00 PM ] Verify proof by client... OK
[ 3/10/2018 1:30:00 PM ] Reading data... error (1)
[ 3/10/2018 1:30:00 PM ] Initialization zTool... error (0 1)
[ 3/10/2018 1:30:00 PM ] Try downgrade modem if possible