A database error has occurred. Did you forget to run maintenance/update.php after upgrading? See: https://www.mediawiki.org/wiki/Manual:Upgrading#Run_the_update_script
Query: SELECT page_title,page_namespace FROM `wiki_page` FORCE INDEX (page_random) WHERE page_namespace = '0' AND page_is_redirect = '0' AND (page_random >= 0.829597053665) ORDER BY page_random LIMIT 1
Function: RandomPage::selectRandomPageFromDB
Error: 1146 Table 'gnome.wiki_page' doesn't exist (localhost)