Внутренняя ошибка

[ZiFQcFNrVEvbLfZAUA7sXwAAAAU] /index.php?title=%D0%97%D0%B0%D0%B3%D0%BB%D0%B0%D0%B2%D0%BD%D0%B0%D1%8F_%D1%81%D1%82%D1%80%D0%B0%D0%BD%D0%B8%D1%86%D0%B0&diff=61030&oldid=110 Error: Call to a member function getUser() on null

Backtrace:

from /web/ganjawiki.ru/includes/diff/DifferenceEngine.php(1688)
#0 /web/ganjawiki.ru/includes/diff/DifferenceEngine.php(1232): DifferenceEngine->getMultiNotice()
#1 /web/ganjawiki.ru/includes/diff/DifferenceEngine.php(1187): DifferenceEngine->getDiff()
#2 /web/ganjawiki.ru/includes/diff/DifferenceEngine.php(929): DifferenceEngine->showDiff()
#3 /web/ganjawiki.ru/includes/page/Article.php(979): DifferenceEngine->showDiffPage()
#4 /web/ganjawiki.ru/includes/page/Article.php(490): Article->showDiffPage()
#5 /web/ganjawiki.ru/includes/actions/ViewAction.php(78): Article->view()
#6 /web/ganjawiki.ru/includes/MediaWiki.php(583): ViewAction->show()
#7 /web/ganjawiki.ru/includes/MediaWiki.php(363): MediaWiki->performAction()
#8 /web/ganjawiki.ru/includes/MediaWiki.php(960): MediaWiki->performRequest()
#9 /web/ganjawiki.ru/includes/MediaWiki.php(613): MediaWiki->main()
#10 /web/ganjawiki.ru/index.php(50): MediaWiki->run()
#11 /web/ganjawiki.ru/index.php(46): wfIndexMain()
#12 {main}