sm-920w8 unlock failing

OK I got this phone 2 weeks ago it had FRP lock, used frp lock and now phone is accessible. I had no idea that octoplus can unlock this device *cause from what I remember it was just CERT methods I guess I need to check here often. So I paid for an unlock code that does not work. tried to other sellers and still same code had to get refunds. I check with oct box and I see it supports unlocking. I seen the video from the team on youtube performing no two different variations. I rooted manually cf auto root and click unlock and it hangs for awhile….at Executing exploit… then fails

Welcome to Octoplus/Octopus Box Samsung software version 2.2.1
To connect SM-N920W8 phone you have to perform the following
1. Disconnect USB cable from phone.
2. Go to Menu->Settings->More->About Device.
3.Tap on "Build number" 7 times to enable developer options.
4. Go to Menu->Settings->More->Developer options.
5. Turn on "USB Debugging" option.
Platform: Samsung Android
Selected port: COM11
Selected model: SM-N920W8
Detected phone model: SM-N920W8
Firmware compiled date: Thu Nov 19 20:24:59 KST 2015
PDA version: N920W8VLU2AOK5
CSC version: N920W8OYA2AOK5
SW version: N920W8VLU2AOK5
Phone SN: RF8G72DCC2J
Android version: 5.1.1 (LMY47X)
Checking Root:
Phone is Rooted.
Reading security backup, please wait…
Backup saved as C:\Program Files (x86)\Octoplus\Octoplus_Samsung
Deactivating MSL…
Executing exploit…
Executing exploit failed
Phone unlocking failed
Performed by 2.2.1 software version

does this have to do with frp prior? or is it same reason the codes I paid for are not working!