This addon is not supported here. You will find much for info on this addon on Reddit. Are you using a premiumize or real-debrid account? This addon's main purpose is streaming torrents using real-debrid or premiumize. I am almost always able to find a great cached stream to play and quality...
Openelec is pretty much dead now, libreelec is by far the best way to go. I have not used on an android box but love it on my pc. Head on over to www.libreelec.tv and you should be able to find the info you need for your box.
The only time I have seen that issue was if the version of kodi that was on the box was not an official version and you then try to install an official version the signatures will not be the same and install will fail. You could try to remove the user data folder before installing again.
Your welcome. You might also note that not all addons use url-resolver for real-debrid authorization and need to be authorized separately from url-resolver. The new Bubbles addon for example has its own real-debrid authorization in the addon itself.
Here is a link to some articles on Real-debrid here on the site. https://www.tvaddons.co/configure-kodi/debrid-kodi/
Pho*nix is another addon that is in the TVAddons repo. There is a list of 5.1 movies in the More-Power section.
There is also a customize able version of confluence called Xonfluence. Here is a link to the thread on the kodi forum, you can give a read and see if it will let you do what you would like.