Problem with RO/RW Add-on


found a RO/RW Add-on to change between ro and rw file system here
Tried to install it from zip file but Kodi says it has the wrong structure.
Changed the version for xbmc.python to 2.19.0 but still the same error.
Anyone any idea were the error is? I’ve read the rules for making an addon but didn’t find the error.

Thanks in advance

If I were you, I’d try to contact the developer via the gitlab link.