If you don't set wgWikiBasePropertyConfig in your LocalSettings.php you get:
Exception encountered, of type "ConfigException"
[c7ef17a1] /wiki/TestSections ConfigException from line 53 of /var/www/html/w/includes/config/GlobalVarConfig.php: GlobalVarConfig::get: undefined option: 'WikiBasePropertyConfig'
Backtrace:
#0 /var/www/html/w/extensions/MobileFrontend/includes/skins/SkinMinervaBeta.php(32): GlobalVarConfig->get(string)
#1 /var/www/html/w/extensions/MobileFrontend/includes/skins/SkinMinervaAlpha.php(53): SkinMinervaBeta->getSkinConfigVariables()
#2 /var/www/html/w/extensions/MobileFrontend/includes/skins/SkinMinerva.php(239): SkinMinervaAlpha->getSkinConfigVariables()
#3 /var/www/html/w/includes/skins/SkinTemplate.php(229): SkinMinerva->initPage(OutputPage)
#4 /var/www/html/w/extensions/MobileFrontend/includes/skins/SkinMinerva.php(1172): SkinTemplate->outputPage()
#5 /var/www/html/w/extensions/MobileFrontend/includes/skins/SkinMinervaBeta.php(45): SkinMinerva->outputPage(OutputPage)
#6 /var/www/html/w/includes/OutputPage.php(2318): SkinMinervaBeta->outputPage()
#7 /var/www/html/w/includes/MediaWiki.php(685): OutputPage->output()
#8 /var/www/html/w/includes/MediaWiki.php(474): MediaWiki->main()
#9 /var/www/html/w/index.php(41): MediaWiki->run()
#10 {main}