can not root my asus transformer with ota 8.6.5.21

[wills7712]

I am very new to tabs, although I have rooted every android phone I've owned. I cannot root my Asus transformer 3.2.1 with the new ota 8.6.5.21. Can anyone help me I have no clue how to do this without a comp and razor claw gives me the error 256. Help please..........