2020-04-07, 00:20
Kodi comes bundled with python and does not use python that may be installed on the system. Kodi 18 and before came with Python 2, early Kodi 19 alphas as well, the more recent ones come with Python 3.
The change to Python 3 required pretty much all addons to be adjusted to be compatible with both Python 2 and 3. Earlier this year Team Kodi decided to classify all addons as incompatible that do not specifically require Python 3, regardless whether they work with Python 2 and 3 or not. Addon devs now have to either maintain 2 versions with different version numbers, abandon Kodi 18 support or just concentrate on Kodi 18 until Kodi 19 has been released.
The addon.xml file as referenced by @juuser is where the python requirement is set and what Kodi 19 looks at. If the python version is not at least 3.0.0, it will refuse to install the addon. Editing the addon.xml file will solve this. However, this addon also requires the kodi-vfs-libarchive and/or kodi-vfs-rar addons to be installed in a compatible version to be able to extract subtitles from rar files. Those addons broke recently and have not been upgraded yet.
The change to Python 3 required pretty much all addons to be adjusted to be compatible with both Python 2 and 3. Earlier this year Team Kodi decided to classify all addons as incompatible that do not specifically require Python 3, regardless whether they work with Python 2 and 3 or not. Addon devs now have to either maintain 2 versions with different version numbers, abandon Kodi 18 support or just concentrate on Kodi 18 until Kodi 19 has been released.
The addon.xml file as referenced by @juuser is where the python requirement is set and what Kodi 19 looks at. If the python version is not at least 3.0.0, it will refuse to install the addon. Editing the addon.xml file will solve this. However, this addon also requires the kodi-vfs-libarchive and/or kodi-vfs-rar addons to be installed in a compatible version to be able to extract subtitles from rar files. Those addons broke recently and have not been upgraded yet.