There is sometimes problems with Leia and autoinstalling plugins dependecys, it just drops out “installation failed”. I did it manually, ever required addon. I installed them one after another manually and got it working.
There are 7 dependencys:
script.module.certifi-2017.07.27.1.zip
script.module.chardet-3.0.4.zip
script.module.idna-2.6.zip
script.module.urllib3-1.22.zip
script.module.requests-2.19.1.zip
script.module.inputstreamhelper-0.3.3.zip
script.module.addon.signals-0.0.3.zip
Sorry but i cant remember the order they needed to be installed, but I think it was certfi, chardet. idna, urlib, requests, inputstreamhelper and then addon.signals. Had to download them manually from:
http://download.osmc.tv/kodi/addons/leia/
Locate the folder for the the add-on needed enter and grab the add-on zip.
Alternative 2: stop mediacenter and mv .kodi folder (which means all your settings will be set to default, no plugins installed etc)
sudo systemctl stop mediacenter
mv .kodi .kodi-old
sudo systemctl start mediacenter
An restart your Netflix installation by addon netflix addon.