Exception encountered, of type "Error"
[ac256aef2983d65a6aa441a2] /w/index.php?title=%E7%89%B9%E5%88%A5:%E3%82%BF%E3%82%B0%E4%B8%80%E8%A6%A7&mobileaction=toggle_view_mobile Error from line 79 of /home/web/arl.jp/w/vendor/wikimedia/html-formatter/src/HtmlFormatter.php: Class 'DOMDocument' not found
Backtrace:
#0 /home/web/arl.jp/w/extensions/MobileFrontend/includes/MobileFormatter.php(119): HtmlFormatter\HtmlFormatter->getDoc()
#1 /home/web/arl.jp/w/extensions/MobileFrontend/includes/MobileFrontend.body.php(71): MobileFormatter->filterContent(boolean, boolean, boolean)
#2 /home/web/arl.jp/w/extensions/MobileFrontend/includes/MobileFrontend.hooks.php(210): ExtMobileFrontend::DOMParse(OutputPage, string, boolean)
#3 /home/web/arl.jp/w/includes/Hooks.php(195): MobileFrontendHooks::onOutputPageBeforeHTML(OutputPage, string)
#4 /home/web/arl.jp/w/includes/OutputPage.php(1848): Hooks::run(string, array)
#5 /home/web/arl.jp/w/includes/OutputPage.php(1866): OutputPage->addParserOutputText(ParserOutput)
#6 /home/web/arl.jp/w/includes/OutputPage.php(1743): OutputPage->addParserOutput(ParserOutput)
#7 /home/web/arl.jp/w/includes/OutputPage.php(1681): OutputPage->addWikiTextTitle(string, Title, boolean, boolean, boolean)
#8 /home/web/arl.jp/w/includes/OutputPage.php(4012): OutputPage->addWikiText(string)
#9 /home/web/arl.jp/w/includes/specials/SpecialTags.php(76): OutputPage->wrapWikiMsg(string, string)
#10 /home/web/arl.jp/w/includes/specials/SpecialTags.php(68): SpecialTags->showTagList()
#11 /home/web/arl.jp/w/includes/specialpage/SpecialPage.php(479): SpecialTags->execute(NULL)
#12 /home/web/arl.jp/w/includes/specialpage/SpecialPageFactory.php(577): SpecialPage->run(NULL)
#13 /home/web/arl.jp/w/includes/MediaWiki.php(282): SpecialPageFactory::executePath(Title, RequestContext)
#14 /home/web/arl.jp/w/includes/MediaWiki.php(735): MediaWiki->performRequest()
#15 /home/web/arl.jp/w/includes/MediaWiki.php(509): MediaWiki->main()
#16 /home/web/arl.jp/w/index.php(43): MediaWiki->run()
#17 {main}