[Q] bootloader locked and knox 0x0 topic

if you have knox 0x0 and took a OTA update does this mean you cant re-root i was rooted then i was foced to update then my root was gone
but my custom rom stayed and super su has now lost all granted access so i'm confused am i not able to root any more because of the update
or what? because odin keeps failing i real want to root my phone again

please help thanks in advance here is my info

Attached Thumbnails