Topic on Extension talk:Include

The script still includes the path "SyntaxHighlight_GeSHi/geshi/geshi.php".

In the current version of the SyntaxHighlight_GeSHi extension this path does not exist.

Is there a Chance that the script will be adapted to the new Extension?

You can either create a pull request to the GitLab repository, or use a workaround: if you set the $wg_include_geshi_install_path variable in LocalSettings.php to the right path (before including the extension), the script will load that instead of the old GeSHi version. However, this extension haven't been updated for more than three years, so it's probably deprecated at many other points, too.

should be fixed with the Extension:SecureInclude update.