Try waiting a few minutes and reloading.
(Cannot access the database)
Backtrace:
#0 /srv/www/lazaruswiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(937): Wikimedia\Rdbms\LoadBalancer->reportConnectionError() #1 /srv/www/lazaruswiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(904): Wikimedia\Rdbms\LoadBalancer->getServerConnection() #2 /srv/www/lazaruswiki/includes/page/WikiPage.php(475): Wikimedia\Rdbms\LoadBalancer->getConnection() #3 /srv/www/lazaruswiki/includes/page/WikiPage.php(590): WikiPage->loadPageData() #4 /srv/www/lazaruswiki/includes/page/WikiPage.php(631): WikiPage->exists() #5 /srv/www/lazaruswiki/includes/page/WikiPage.php(311): WikiPage->getContentModel() #6 /srv/www/lazaruswiki/includes/page/WikiPage.php(297): WikiPage->getContentHandler() #7 /srv/www/lazaruswiki/includes/page/Article.php(2550): WikiPage->getActionOverrides() #8 /srv/www/lazaruswiki/includes/actions/Action.php(130): Article->getActionOverrides() #9 /srv/www/lazaruswiki/includes/actions/Action.php(189): Action::factory() #10 /srv/www/lazaruswiki/includes/MediaWiki.php(166): Action::getActionName() #11 /srv/www/lazaruswiki/includes/MediaWiki.php(908): MediaWiki->getAction() #12 /srv/www/lazaruswiki/includes/MediaWiki.php(548): MediaWiki->main() #13 /srv/www/lazaruswiki/index.php(53): MediaWiki->run() #14 /srv/www/lazaruswiki/index.php(46): wfIndexMain() #15 {main}