MediaWiki internal error.

Original exception: [1e30b655] /index.php?title=Spezial:Dateien MWException from line 226 of /usr/www/users/qualite/gedicap/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 /usr/www/users/qualite/gedicap/includes/parser/Parser.php(435): Hooks::run(string, array)
#1 /usr/www/users/qualite/gedicap/includes/OutputPage.php(1721): Parser->parse(string, Title, ParserOptions, boolean, boolean, NULL)
#2 /usr/www/users/qualite/gedicap/includes/OutputPage.php(1664): OutputPage->addWikiTextTitle(string, Title, boolean, boolean, boolean)
#3 /usr/www/users/qualite/gedicap/includes/OutputPage.php(3870): OutputPage->addWikiText(string)
#4 /usr/www/users/qualite/gedicap/includes/specialpage/SpecialPage.php(452): OutputPage->wrapWikiMsg(string, string)
#5 /usr/www/users/qualite/gedicap/includes/specials/SpecialListfiles.php(31): SpecialPage->outputHeader()
#6 /usr/www/users/qualite/gedicap/includes/specialpage/SpecialPage.php(384): SpecialListFiles->execute(NULL)
#7 /usr/www/users/qualite/gedicap/includes/specialpage/SpecialPageFactory.php(582): SpecialPage->run(NULL)
#8 /usr/www/users/qualite/gedicap/includes/MediaWiki.php(267): SpecialPageFactory::executePath(Title, RequestContext)
#9 /usr/www/users/qualite/gedicap/includes/MediaWiki.php(566): MediaWiki->performRequest()
#10 /usr/www/users/qualite/gedicap/includes/MediaWiki.php(414): MediaWiki->main()
#11 /usr/www/users/qualite/gedicap/index.php(43): MediaWiki->run()
#12 {main}

Exception caught inside exception handler: [f373452a] /index.php?title=Spezial:Dateien MWException from line 226 of /usr/www/users/qualite/gedicap/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 /usr/www/users/qualite/gedicap/includes/parser/Parser.php(435): Hooks::run(string, array)
#1 /usr/www/users/qualite/gedicap/includes/cache/MessageCache.php(1056): Parser->parse(string, Title, ParserOptions, boolean)
#2 /usr/www/users/qualite/gedicap/includes/Message.php(1038): MessageCache->parse(string, Title, boolean, boolean, Language)
#3 /usr/www/users/qualite/gedicap/includes/Message.php(721): Message->parseText(string)
#4 /usr/www/users/qualite/gedicap/includes/Message.php(777): Message->toString()
#5 /usr/www/users/qualite/gedicap/includes/skins/Skin.php(654): Message->parse()
#6 /usr/www/users/qualite/gedicap/includes/skins/SkinTemplate.php(418): Skin->printSource()
#7 /usr/www/users/qualite/gedicap/includes/skins/SkinTemplate.php(230): SkinTemplate->prepareQuickTemplate(OutputPage)
#8 /usr/www/users/qualite/gedicap/includes/OutputPage.php(2288): SkinTemplate->outputPage()
#9 /usr/www/users/qualite/gedicap/includes/exception/MWException.php(204): OutputPage->output()
#10 /usr/www/users/qualite/gedicap/includes/exception/MWException.php(245): MWException->reportHTML()
#11 /usr/www/users/qualite/gedicap/includes/exception/MWExceptionHandler.php(59): MWException->report()
#12 /usr/www/users/qualite/gedicap/includes/exception/MWExceptionHandler.php(169): MWExceptionHandler::report(MWException)
#13 /usr/www/users/qualite/gedicap/includes/MediaWiki.php(428): MWExceptionHandler::handleException(MWException)
#14 /usr/www/users/qualite/gedicap/index.php(43): MediaWiki->run()
#15 {main}