SuperSU app stuck on KNOX Disabling (Samsung galaxy models KNOX problem)

So here is the simple solution to disable KNOX in samsung phones

Step 1:
Download Terminal Emulator android from google play store
Step 2:
Give it root access by writing su in command
Step 3:
Open Emulator Terminal application and write following command

1->   su2->   pm disable com.sec.knox.seandroid

Cheers' Now.
Now SuperSu will perfectly ok