Sorry for troubles with SuperSU 2.82 - but Chainfire and CCMT has changed in 2.82 a lot of code.
It is better to Unroot from SuperSU App and restore boot.img before flashing 2.82.
And prerooted boot.imgs are difficult to handle.
Better to find Stock boot.img, flash it with fastboot and after flashing Root with TWRP.
KangV Roms are working with Stock boot.img and Version 3
It is better to Unroot from SuperSU App and restore boot.img before flashing 2.82.
And prerooted boot.imgs are difficult to handle.
Better to find Stock boot.img, flash it with fastboot and after flashing Root with TWRP.
KangV Roms are working with Stock boot.img and Version 3