erreur The content model 'sanitized-css' is not registered on this wiki.
source
Échec de l’importation : The content model 'sanitized-css' is not registered on this wiki. See https://www.mediawiki.org/wiki/Content_handlers to find out which extensions handle this content model.
# cd /tmp/
# wget https://extdist.wmflabs.org/dist/extensions/TemplateStyles-REL1_35-7a40a6a.tar.gz
# tar -xzf TemplateStyles-REL1_35-7a40a6a.tar.gz -C /var/www/mediawiki/extensions
# chown -R www-data. /var/www/mediawiki/extensions/TemplateStyles
# echo "wfLoadExtension( 'TemplateStyles' );" >> /var/www/mediawiki/LocalSettings.php