2015-08-20, 21:50
Even though you have all the addon files as required in the zip - it still has several dependencies that the addon needs to run. Normally Kodi tries to go out the internet and get these from the repo. If it can't you get the error you're seeing. These dependencies, as listed in the addon.xml file, are:
The xbmc.python one has to stay as that is the Kodi python lib; however the rest only apply for using Google Drive as a target. If you aren't planning on doing this, then just erase these from the addon.xml file if you really need this to install without internet.
Code:
<requires>
<import addon="xbmc.python" version="2.19.0"/>
<import addon="script.module.httplib2" version="0.8.0" />
<import addon="script.module.oauth2client" version="1.4.7" />
<import addon="script.module.uritemplate" version="0.6" />
<import addon="script.module.yaml" version="3.11"/>
<import addon="script.module.googleapi" version="1.4.0" />
</requires>
The xbmc.python one has to stay as that is the Kodi python lib; however the rest only apply for using Google Drive as a target. If you aren't planning on doing this, then just erase these from the addon.xml file if you really need this to install without internet.