How to install Elementtree XML parser?
Elementtree XML parser is available in the official Kodi repository which is included by default in Kodi. You can install this addon by going in Kodi to System >> Settings >> Addons >> Get Addons >> XBMC.org Addons or Kodi.tv Addons
About SuperRepo and Elementtree XML parser
SuperRepo does not maintain Elementtree XML parser. We only provide an automated index for Kodi users to have easy access to Elementtree XML parser and other addons for Kodi. We are not affiliated with the developers (http://effbot.org/zone/element-index.htm) and do not provide help for this particular addon.