https://wiki.debconf.org/wiki/Special:Version MediaWiki 1.19.20+dfsg-0+deb7u3 is perilously out of date. Compare: https://en.wikipedia.org/wiki/Special:Version MediaWiki 1.31.0-wmf.17 (b34e25b) $ apt-cache policy mediawiki mediawiki: Candidate: 1:1.27.4-3 P.S., your $wgLogo is missing.