Following error shows on 'Special:Diff' page after installing [[https://www.mediawiki.org/wiki/Extension:RevisionSlider|RevisionSlider]]:
```[fa23c1e5a6d668f2867b91c1] /plavorexitbeta/index.php?title=%EB%8C%80%EB%AC%B8&curid=137&diff=1127&oldid=1124 Exception from line 1210 of C:\NGINX\html\plavorexitbeta\includes\diff\DifferenceEngine.php: WikEdDifferenceEngine: could not maintain backwards compatibility. Please use a SlotDiffRenderer.
Backtrace:
#0 C:\NGINX\html\plavorexitbeta\includes\diff\DifferenceEngineSlotDiffRenderer.php(58): DifferenceEngine->generateContentDiffBody(WikitextContent, WikitextContent)
#1 C:\NGINX\html\plavorexitbeta\includes\diff\DifferenceEngine.php(1024): DifferenceEngineSlotDiffRenderer->getDiff(WikitextContent, WikitextContent)
#2 C:\NGINX\html\plavorexitbeta\includes\diff\DifferenceEngine.php(942): DifferenceEngine->getDiffBody()
#3 C:\NGINX\html\plavorexitbeta\includes\diff\DifferenceEngine.php(907): DifferenceEngine->getDiff(string, string, string)
#4 C:\NGINX\html\plavorexitbeta\includes\diff\DifferenceEngine.php(701): DifferenceEngine->showDiff(string, string, string)
#5 C:\NGINX\html\plavorexitbeta\includes\page\Article.php(750): DifferenceEngine->showDiffPage(boolean)
#6 C:\NGINX\html\plavorexitbeta\includes\page\Article.php(477): Article->showDiffPage()
#7 C:\NGINX\html\plavorexitbeta\includes\actions\ViewAction.php(68): Article->view()
#8 C:\NGINX\html\plavorexitbeta\includes\MediaWiki.php(501): ViewAction->show()
#9 C:\NGINX\html\plavorexitbeta\includes\MediaWiki.php(294): MediaWiki->performAction(Article, Title)
#10 C:\NGINX\html\plavorexitbeta\includes\MediaWiki.php(868): MediaWiki->performRequest()
#11 C:\NGINX\html\plavorexitbeta\includes\MediaWiki.php(525): MediaWiki->main()
#12 C:\NGINX\html\plavorexitbeta\index.php(42): MediaWiki->run()
#13 {main}```