MediaWiki internal error.

Original exception: [3c98f38b] /wiki/index.php?title=Special:RecentChangesLinked/Cotswold_Wool_(Hunt_and_Winterbotham) MWException from line 226 of /home/mfomeuk/public_html/wiki/includes/Hooks.php: Detected bug in an extension! Hook Cite::checkRefsNoReferences has invalid call signature; Parameter 2 to Cite::checkRefsNoReferences() expected to be a reference, value given
Backtrace:
#0 /home/mfomeuk/public_html/wiki/includes/parser/Parser.php(435): Hooks::run(string, array)
#1 /home/mfomeuk/public_html/wiki/includes/OutputPage.php(1721): Parser->parse(string, Title, ParserOptions, boolean, boolean, NULL)
#2 /home/mfomeuk/public_html/wiki/includes/OutputPage.php(1664): OutputPage->addWikiTextTitle(string, Title, boolean, boolean, boolean)
#3 /home/mfomeuk/public_html/wiki/includes/OutputPage.php(3870): OutputPage->addWikiText(string)
#4 /home/mfomeuk/public_html/wiki/includes/specialpage/SpecialPage.php(452): OutputPage->wrapWikiMsg(string, string)
#5 /home/mfomeuk/public_html/wiki/includes/specialpage/ChangesListSpecialPage.php(49): SpecialPage->outputHeader()
#6 /home/mfomeuk/public_html/wiki/includes/specials/SpecialRecentchanges.php(60): ChangesListSpecialPage->execute(string)
#7 /home/mfomeuk/public_html/wiki/includes/specialpage/SpecialPage.php(384): SpecialRecentChanges->execute(string)
#8 /home/mfomeuk/public_html/wiki/includes/specialpage/SpecialPageFactory.php(582): SpecialPage->run(string)
#9 /home/mfomeuk/public_html/wiki/includes/MediaWiki.php(267): SpecialPageFactory::executePath(Title, RequestContext)
#10 /home/mfomeuk/public_html/wiki/includes/MediaWiki.php(566): MediaWiki->performRequest()
#11 /home/mfomeuk/public_html/wiki/includes/MediaWiki.php(414): MediaWiki->main()
#12 /home/mfomeuk/public_html/wiki/index.php(41): MediaWiki->run()
#13 {main}

Exception caught inside exception handler: [64bb4158] /wiki/index.php?title=Special:RecentChangesLinked/Cotswold_Wool_(Hunt_and_Winterbotham) MWException from line 226 of /home/mfomeuk/public_html/wiki/includes/Hooks.php: Detected bug in an extension! Hook Cite::checkRefsNoReferences has invalid call signature; Parameter 2 to Cite::checkRefsNoReferences() expected to be a reference, value given
Backtrace:
#0 /home/mfomeuk/public_html/wiki/includes/parser/Parser.php(435): Hooks::run(string, array)
#1 /home/mfomeuk/public_html/wiki/includes/cache/MessageCache.php(1056): Parser->parse(string, Title, ParserOptions, boolean)
#2 /home/mfomeuk/public_html/wiki/includes/Message.php(1038): MessageCache->parse(string, Title, boolean, boolean, Language)
#3 /home/mfomeuk/public_html/wiki/includes/Message.php(721): Message->parseText(string)
#4 /home/mfomeuk/public_html/wiki/includes/Message.php(777): Message->toString()
#5 /home/mfomeuk/public_html/wiki/includes/skins/Skin.php(654): Message->parse()
#6 /home/mfomeuk/public_html/wiki/includes/skins/SkinTemplate.php(418): Skin->printSource()
#7 /home/mfomeuk/public_html/wiki/includes/skins/SkinTemplate.php(230): SkinTemplate->prepareQuickTemplate(OutputPage)
#8 /home/mfomeuk/public_html/wiki/includes/OutputPage.php(2288): SkinTemplate->outputPage()
#9 /home/mfomeuk/public_html/wiki/includes/exception/MWException.php(204): OutputPage->output()
#10 /home/mfomeuk/public_html/wiki/includes/exception/MWException.php(245): MWException->reportHTML()
#11 /home/mfomeuk/public_html/wiki/includes/exception/MWExceptionHandler.php(59): MWException->report()
#12 /home/mfomeuk/public_html/wiki/includes/exception/MWExceptionHandler.php(169): MWExceptionHandler::report(MWException)
#13 /home/mfomeuk/public_html/wiki/includes/MediaWiki.php(428): MWExceptionHandler::handleException(MWException)
#14 /home/mfomeuk/public_html/wiki/index.php(41): MediaWiki->run()
#15 {main}