Download the twrp 126.96.36.199 .img from the link below. Make sure it is .img file.
Do not download .tar file
Then install the flashify app from playstore.
Hit 'flash recovery image' button
Then hit 'choose a file'
Now choose the file you just downloaded
(looks something like: twrp-188.8.131.52-gt-klte.img
Flashify will flash the image for you. Once its done, just reboot into recovery mode and twrp screen should come up
Sent from my SM-G900T using XDA Premium 4 mobile app