You can clear cache on kodi by following the given steps at the end of this post.
There is a possibility that you have your cache filled up on kodi. Hope this helps and you get your in build installed successfully. If you have any trouble installing them the help is great at that site as well. It shows you the best kodi builds for 2018 and gives full tutorials on how to install them. If your looking to install a build check the link I posted below. Be sure your not using Ares Wizard niether to install the builds, as Areas Wizard for build installation went down as well. Sometimes when the repositories are down you will get an error and the build wont be install. If your getting an error with Kodi Krypton I would suggest taking a look at the repositories and if they are still working.
