Trouble installing Kodi 17 Beta7 (Krypton) on machine that will run Jarvis 16.1

I’m trying to help a friend who bought what I feel is a cheap android box and can’t return it.
The Android box being used to host Kodi will run the Jarvis 16.1 release downloaded from the site.
The box is a KAHOSII with a Rockchip RK3368 Octa-core cpu and running Androidâ„¢ 5.1 (Lollipop).
(I called the box “cheap”, because nobody seems to know anything about it, nor can a find a website for it.)

Trying to install Kodi 17 Beta 7 results in a failed install.

Could someone confirm the variant of Kodi that should be used and offer some advice on getting Krypton to install or some site that might help understand what to do?