Thread:Project:Support desk/Updating from 1.17 not working/reply (3)

MediaWiki 1.24.1 does contain a includes/libs/ScopedCallback.php file - the version I downloaded back in December 2014 did and the tarball offered for download right now does as well. Can you please double check, why that file is missing for you? Did all files from the new tarball get extracted correctly? This file should be there!