Exception encountered, of type "Wikimedia\Assert\ParameterTypeException"
[V072QgpAMFsAALcXnLAAAAAW] /wiki/Special:ListUsers/sysop Wikimedia\Assert\ParameterTypeException from line 89 of /srv/mediawiki/php-1.28.0-wmf.4/vendor/wikimedia/assert/src/Assert.php: Bad value for parameter $dbkey: must be a string
Backtrace:
#0 /srv/mediawiki/php-1.28.0-wmf.4/includes/title/TitleValue.php(76): Wikimedia\Assert\Assert::parameterType(string, integer, string)
#1 /srv/mediawiki/php-1.28.0-wmf.4/includes/cache/LinkBatch.php(171): TitleValue->__construct(integer, integer)
#2 /srv/mediawiki/php-1.28.0-wmf.4/includes/cache/LinkBatch.php(135): LinkBatch->addResultToCache(LinkCache, ResultWrapper)
#3 /srv/mediawiki/php-1.28.0-wmf.4/includes/cache/LinkBatch.php(122): LinkBatch->executeInto(LinkCache)
#4 /srv/mediawiki/php-1.28.0-wmf.4/includes/specials/pagers/UsersPager.php(254): LinkBatch->execute()
#5 /srv/mediawiki/php-1.28.0-wmf.4/includes/pager/IndexPager.php(424): UsersPager->doBatchLookups()
#6 /srv/mediawiki/php-1.28.0-wmf.4/includes/specials/SpecialListusers.php(51): IndexPager->getBody()
#7 /srv/mediawiki/php-1.28.0-wmf.4/includes/specialpage/SpecialPage.php(479): SpecialListUsers->execute(string)
#8 /srv/mediawiki/php-1.28.0-wmf.4/includes/specialpage/SpecialPageFactory.php(591): SpecialPage->run(string)
#9 /srv/mediawiki/php-1.28.0-wmf.4/includes/MediaWiki.php(282): SpecialPageFactory::executePath(Title, RequestContext)
#10 /srv/mediawiki/php-1.28.0-wmf.4/includes/MediaWiki.php(746): MediaWiki->performRequest()
#11 /srv/mediawiki/php-1.28.0-wmf.4/includes/MediaWiki.php(520): MediaWiki->main()
#12 /srv/mediawiki/php-1.28.0-wmf.4/index.php(43): MediaWiki->run()
#13 /srv/mediawiki/w/index.php(3): include(string)
#14 {main}