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

Your installation seems to include the following skin. See Manual: Skin configuration for information how to enable it.

minervaneue / MinervaNeue (disabled)

You can paste the following line into LocalSettings.php to enable the installed skin:

wfLoadSkin( 'MinervaNeue' );

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.

User:Maintenance script

ContentProvider failed to load page https://user.wikipedia.org/w/api.php?formatversion=2&format=json&action=parse&prop=revid|text|modules|sections|properties|langlinks&page=User%3AMaintenance_script&skin=apioutput with following error: http-curl-error (Could not resolve host: user.wikipedia.org), http-bad-status (0 Error)

Retrieved from "https://de4cc099ff.catalyst.wmcloud.org/wiki/User:Maintenance_script"