Subpixel hinting guide install does not work

the guide for enabling subpixel hinting SubpixelHinting - openSUSE-Community does not work, it produces:

zypper ref subpixel
Downloading repository ‘freetype2 with subpixel hinting’ metadata [error]
Repository ‘freetype2 with subpixel hinting’ is invalid.
File /var/cache/zypp/raw/subpixelG6GmTK/repodata/repomd.xml.key doesn’t contain public key data
Please check if the URIs defined for this repository are pointing to a valid repository.
Skipping repository ‘freetype2 with subpixel hinting’ because of the above error.
Could not refresh the repositories because of errors.

The one-click install produces the same error.

However, the previous version of this guide does work, which downloads and rebuilds the package.

Have your tried the freetype2 package from THIS repo?

Did you try the Smart install on the same page.

I got the same error with zypper but the smart install worked fine.


Can you please explain how to use this?