Internal error

From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide

[ZgWXxeJrUqJW7BwXXeWc-gAAAZM] /w/index.php?title=Agro_Ship&diff=236803&oldid=20612 Error: Call to a member function getUser() on null

Backtrace:

from /var/www/vhosts/battlestarwiki.org/en.battlestarwiki.org/w/includes/diff/DifferenceEngine.php(1677)
#0 /var/www/vhosts/battlestarwiki.org/en.battlestarwiki.org/w/includes/diff/DifferenceEngine.php(1204): DifferenceEngine->getMultiNotice()
#1 /var/www/vhosts/battlestarwiki.org/en.battlestarwiki.org/w/includes/diff/DifferenceEngine.php(1159): DifferenceEngine->getDiff()
#2 /var/www/vhosts/battlestarwiki.org/en.battlestarwiki.org/w/includes/diff/DifferenceEngine.php(922): DifferenceEngine->showDiff()
#3 /var/www/vhosts/battlestarwiki.org/en.battlestarwiki.org/w/includes/page/Article.php(952): DifferenceEngine->showDiffPage()
#4 /var/www/vhosts/battlestarwiki.org/en.battlestarwiki.org/w/includes/page/Article.php(486): Article->showDiffPage()
#5 /var/www/vhosts/battlestarwiki.org/en.battlestarwiki.org/w/includes/actions/ViewAction.php(78): Article->view()
#6 /var/www/vhosts/battlestarwiki.org/en.battlestarwiki.org/w/includes/MediaWiki.php(556): ViewAction->show()
#7 /var/www/vhosts/battlestarwiki.org/en.battlestarwiki.org/w/includes/MediaWiki.php(333): MediaWiki->performAction()
#8 /var/www/vhosts/battlestarwiki.org/en.battlestarwiki.org/w/includes/MediaWiki.php(923): MediaWiki->performRequest()
#9 /var/www/vhosts/battlestarwiki.org/en.battlestarwiki.org/w/includes/MediaWiki.php(576): MediaWiki->main()
#10 /var/www/vhosts/battlestarwiki.org/en.battlestarwiki.org/w/index.php(50): MediaWiki->run()
#11 /var/www/vhosts/battlestarwiki.org/en.battlestarwiki.org/w/index.php(46): wfIndexMain()
#12 {main}