v12 - Frodo - latest version of XBMC (now renamed to Kodi) we officially support for iMX6 and M6 devices
v13 - Gotham - latest version of XBMC we officially support for all other devices
v14 - Kodi - Available from their own website, BUT... Our Wizard isn't yet compatible with it AND quite a few video add-ons haven't been updated to ensure compatibility just yet.
Which add-on is incompatible with Gotham btw? It may be that wiping XBMC's data (
http://www.droidboxforums.com/threads/resetting-xbmc-to-a-just-installed-state.27/ which is a part of running the Wizard correctly anyway) and re-running the Wizard -
https://droidbox.co.uk/blog/wizard-updated-2015-january/ is enough to clear the problem.
If the error was for a skin you don't use, or an add-on that covers Live Outer Mongolian Sheep Wrestling you can safely ignore it.