Whoops! The default skin for your wiki, defined in $wgDefaultSkin as vector-2022, is not available.

Your installation seems to include the following skins. See Manual: Skin configuration for information how to enable them and choose the default.

minervaneue / MinervaNeue (disabled)
monobook / MonoBook (disabled)
timeless / Timeless (disabled)
vector / Vector (disabled)

You can paste the following lines into LocalSettings.php to enable all installed skins:

wfLoadSkin( 'MinervaNeue' );
wfLoadSkin( 'MonoBook' );
wfLoadSkin( 'Timeless' );
wfLoadSkin( 'Vector' );

If you have just installed MediaWiki

You probably installed from Git, or directly from the source code using some other method. This is expected. Try installing some skins from mediawiki.org's skin directory, by:

Downloading the tarball installer, which comes with several skins and extensions. You can copy and paste the skins/ directory from it.
Downloading individual skin tarballs from mediawiki.org.
Using Git to download skins.

Doing this should not interfere with your Git repository if you're a MediaWiki developer.

If you have just modified LocalSettings.php: Double-check the skin names for typos.

Alessandra Karpoff

Alessandra Karpoff (born April 30, 1963) is an Italian voice actress. She voiced Misty in Pokémon, Rei Hino/Sailor Mars in the first series of Sailor Moon, Michiru Kaioh/Sailor Neptune in the third and Makoto Kino/Sailor Jupiter in the last two, April O'Neil in the original Teenage Mutant Ninja Turtles series and in the 2003 one, Zoe in Littlest Pet Shop, Princess Toadstool in The Super Mario Bros. Super Show, The Adventures of Super Mario Bros. 3 and Super Mario World, Nanette in Angela Anaconda and Sam in Totally Spies, among others.