[Galaxy S6 Q&A, Help & Troubleshooting] adfree:
A

Please NOT change something in Odin... use Standard Settings!

B

Strange...

IMHO if Knox is 1 then also the "minor" stuff should be changed... IMHO this is "Error Code"...:eek:

C

Yes I know sounds useless... but please check few more TWRP Recovery VersionS...

For me I am an Fan to try oldest stuff...

https://dl.twrp.me/zeroflte/

twrp-3.3.1-0-zeroflte.img.tar	24.8M	2019-05-21 15:24:45 EDT
twrp-3.3.1-0-zeroflte.img	24.8M	2019-05-21 15:24:45 EDT
twrp-3.3.0-0-zeroflte.img.tar	24.8M	2019-04-12 14:42:15 EDT
twrp-3.3.0-0-zeroflte.img	24.8M	2019-04-12 14:42:14 EDT
twrp-3.2.3-0-zeroflte.img.tar	24.8M	2018-08-04 13:04:34 EDT
twrp-3.2.3-0-zeroflte.img	24.8M	2018-08-04 13:04:34 EDT
twrp-3.2.2-0-zeroflte.img.tar	24.8M	2018-07-02 09:40:48 EDT
twrp-3.2.2-0-zeroflte.img	24.8M	2018-07-02 09:40:47 EDT
twrp-3.2.1-0-zeroflte.img.tar	24.8M	2018-01-15 19:57:46 EST
twrp-3.2.1-0-zeroflte.img	24.8M	2018-01-15 19:57:46 EST
twrp-3.1.1-0-zeroflte.img.tar	24.8M	2017-05-18 15:48:10 EDT
twrp-3.1.1-0-zeroflte.img	24.7M	2017-05-18 15:48:10 EDT
twrp-3.1.0-0-zeroflte.img.tar	24.8M	2017-03-09 20:30:45 EST
twrp-3.1.0-0-zeroflte.img	24.8M	2017-03-09 20:30:45 EST
twrp-3.0.2-1-zeroflte.img.tar	24.7M	2016-05-22 13:40:51 EDT
twrp-3.0.2-1-zeroflte.img	24.7M	2016-05-22 13:40:51 EDT
twrp-3.0.2-0-zeroflte.img.tar	25.8M	2016-04-05 07:58:25 EDT
twrp-3.0.2-0-zeroflte.img	25.8M	2016-04-05 07:58:25 EDT
twrp-3.0.1-0-zeroflte.img.tar	25.8M	2016-04-01 13:39:34 EDT
twrp-3.0.1-0-zeroflte.img	25.8M	2016-04-01 13:39:34 EDT
twrp-3.0.0-1-zeroflte.img.tar	25.7M	2016-02-29 12:05:10 EST
twrp-3.0.0-1-zeroflte.img	25.7M	2016-02-29 12:05:10 EST
twrp-3.0.0-0-zeroflteusc.img	25.1M	2016-02-06 08:47:26 EST
twrp-3.0.0-0-zerofltespr.img.tar	25.3M	2016-02-18 09:46:55 EST
twrp-3.0.0-0-zerofltespr.img	25.1M	2016-02-18 09:46:55 EST
twrp-3.0.0-0-zeroflte.img.tar	25.2M	2016-02-26 17:08:49 EST
twrp-3.0.0-0-zeroflte.img	25.2M	2016-02-26 17:08:48 EST
twrp-2.8.7.2-zeroflte.img.tar	25.7M	2015-10-13 07:51:37 EDT
twrp-2.8.7.2-zeroflte.img	25.7M	2015-10-18 16:15:32 EDT
twrp-2.8.7.1-zeroflte.img.tar	25.5M	2015-06-26 14:56:09 EDT
twrp-2.8.7.1-zeroflte.img	25.5M	2015-06-26 14:56:08 EDT
twrp-2.8.7.0-zerofltespr.img.tar	25.8M	2015-08-18 10:39:56 EDT
twrp-2.8.7.0-zerofltespr.img	25.7M	2015-08-18 16:27:24 EDT
twrp-2.8.7.0-zeroflte.img.tar	25.1M	2015-06-22 12:26:22 EDT
twrp-2.8.7.0-zeroflte.img	25.7M	2015-10-18 16:11:30 EDT
twrp-2.8.6.2-zeroflte.img.tar	25.4M	2015-05-06 21:23:17 EDT
twrp-2.8.6.2-zeroflte.img	25.4M	2015-05-06 21:23:17 EDT
twrp-2.8.6.1-zeroflte.img.tar	25.4M	2015-05-06 21:04:44 EDT
twrp-2.8.6.1-zeroflte.img	25.4M	2015-05-06 21:04:44 EDT
twrp-2.8.6.0-zerofltespr.img.tar	25.1M	2015-04-16 11:58:47 EDT
twrp-2.8.6.0-zerofltespr.img	25.1M	2015-04-16 11:58:47 EDT
twrp-2.8.6.0-zeroflte.img.tar	25.2M	2015-04-16 20:22:10 EDT
twrp-2.8.6.0-zeroflte.img	25.2M	2015-04-16 20:22:09 EDT

IMHO try from bottom... oldest Version...

Start with:

twrp-2.8.6.0-zeroflte.img

Then 2 or 3 more ... different Versions

NO JOKE!

Really, I am not kidding...

Reason is to check if by luck someting is different and maybe by luck brings you to boot Recovery...

D

Did you ever seen Threads or Posts with EFS and/or NV files?

Later I will upload something or Link...

Maybe Security is dead...

Best Regards