Unable to root phone after installing Custom ROM. PLEASE HELP.

Hi Guys.

I recently installed CyanogenMod 13 on Samsung Galaxy S3 i9300. The Root access was lost and I tried to root it again.
It fails every time I try to root it. I've tried every app that roots the phone.

It's Android 6.0.1. Just in case.

Pls help.
Thanks.

from xda-developers http://ift.tt/2dx8A8D
via IFTTT