As @Maupiti said. I would suggest starting again by clearing your webdata and cookies and recaching the menu, and maybe reflashing the ESP as well.Strangly with my PS4 Pro 7016 on 9.0 it doesn't work.
I allways get a Error on the Kernel Exploit. Either it hangs and shows NaN or it simply tells me it failed and i should try and reboot.
I tried both the standard USB Version as well as the ESP (1 and 2) Variants at least 10-15 times. Cleared the Browser Data and Cookies ect.
Why is that ? Other Exploit sites work much better but have older HEN ect.
All those undefined and NaN means that it's not getting the values from the ESP and the initial values that are set when you first install/cache the menu.
Also, make sure you do things in the correct order when setting everything up. If not it wont work correctly.