Version: 1.30 (RC)
PHP: 5.6
After upgrading MediaWiki to the 1.30 RC version, getting this fatal PHP error with Wikibase, making the site go down:
[01-Dec-2017 18:44:58 UTC] PHP Fatal error: Class 'Wikibase\WikibaseSettings' not found in /srv/mediawiki/w/extensions/Wikibase/repo/includes/WikibaseRepo.php on line 302