That's good news - thanks for your feedback.
Which version did you use? @jasonseye
@cline2 It's interesting.. Same device, same Rom, working here but not there
What you can try is following:
Open Settings, right down menu more - click "show system processing"
Search for settings. Go inside - you see "storage" and "permissions " Open first permissions and allow "storage" if it is not set - go back one window to "storage" and delete inside: data and cache.
Settings switch now away, never mind.
Reboot phone and try, if Developer Options are working now.
I think it is not the fault of SuperSU if this problem occur - it must be something with configuration.
Maybe the Stock Firmware from which you flashed KangV Rom was different or something like that.
But anyway I make a second alternative SuperSU zip for KangV Roms