Fatal error: Could not check compatibility between MediaWiki\Extension\WikimediaMessages\Hooks::onSkinAddFooterLinks(MediaWiki\Skin\Skin $skin, string $key, array &$footerLinks) and MediaWiki\Hook\SkinAddFooterLinksHook::onSkinAddFooterLinks(Skin $skin, string $key, array &$footerItems), because class MediaWiki\Skin\Skin is not available in /var/www/cx-ofb/extensions/WikimediaMessages/includes/Hooks.php on line 539