Thread:Project:Support desk/Can't enable skin Vector.php/reply

When you install MediaWiki, have you then taken a checkout from the Git versioning system? Doing so would be a way I could imagine you get this error.

In contrast, for normal end users, the recommended installation method is to use a tarball from here: http://releases.wikimedia.org/mediawiki/1.25/mediawiki-1.25.1.tar.gz. 1.25 btw. is the newest version - but a 1.24.2 tarball is available as well, if you want that. These tarballs contain everything you need, also the Vector skin in the correct version. :-)