Kodi 17 on IOS10.1.1 iphone 7

I have installed kodi 17 on a iPhone 7 with IOS 10.1.1.
I think installation went well

However, i want to install kaosbox on kodi.

Went to add on –> install from repository

the problem is that the option “new folder” to add is disabled.

How can it be enabled, so i can add kaosbox (http://install.kaosbox.tv)

Thanks for the help in advance !

Adriaan