Exception encountered, of type "FileBackendException"
[5242be74] /wiki/Timeline_of_Slashed_Sources FileBackendException from line 142 of /var/www/wiki/w/includes/filebackend/FileBackend.php: Backend wiki ID not provided for 'timeline-backend'.
Backtrace:
#0 /var/www/wiki/w/includes/filebackend/FileBackendStore.php(69): FileBackend->__construct(array)
#1 /var/www/wiki/w/includes/filebackend/FSFileBackend.php(69): FileBackendStore->__construct(array)
#2 /var/www/wiki/w/extensions/timeline/Timeline.php(81): FSFileBackend->__construct(array)
#3 [internal function]: wfRenderTimeline(string, array, Parser, PPTemplateFrame_DOM)
#4 /var/www/wiki/w/includes/parser/Parser.php(4234): call_user_func_array(string, array)
#5 /var/www/wiki/w/includes/parser/Preprocessor_DOM.php(1262): Parser->extensionSubstitution(array, PPTemplateFrame_DOM)
#6 /var/www/wiki/w/includes/parser/Preprocessor_DOM.php(1624): PPFrame_DOM->expand(PPNode_DOM, integer)
#7 /var/www/wiki/w/includes/parser/Parser.php(3662): PPTemplateFrame_DOM->cachedExpand(string, PPNode_DOM)
#8 /var/www/wiki/w/includes/parser/Preprocessor_DOM.php(1177): Parser->braceSubstitution(array, PPFrame_DOM)
#9 /var/www/wiki/w/includes/parser/Parser.php(3342): PPFrame_DOM->expand(PPNode_DOM, integer)
#10 /var/www/wiki/w/includes/parser/Parser.php(1239): Parser->replaceVariables(string)
#11 /var/www/wiki/w/includes/parser/Parser.php(439): Parser->internalParse(string)
#12 /var/www/wiki/w/includes/content/WikitextContent.php(331): Parser->parse(string, Title, ParserOptions, boolean, boolean, integer)
#13 /var/www/wiki/w/includes/content/AbstractContent.php(497): WikitextContent->fillParserOutput(Title, integer, ParserOptions, boolean, ParserOutput)
#14 /var/www/wiki/w/includes/poolcounter/PoolWorkArticleView.php(140): AbstractContent->getParserOutput(Title, integer, ParserOptions)
#15 /var/www/wiki/w/includes/poolcounter/PoolCounterWork.php(123): PoolWorkArticleView->doWork()
#16 /var/www/wiki/w/includes/page/Article.php(676): PoolCounterWork->execute()
#17 /var/www/wiki/w/includes/actions/ViewAction.php(44): Article->view()
#18 /var/www/wiki/w/includes/MediaWiki.php(490): ViewAction->show()
#19 /var/www/wiki/w/includes/MediaWiki.php(287): MediaWiki->performAction(Article, Title)
#20 /var/www/wiki/w/includes/MediaWiki.php(714): MediaWiki->performRequest()
#21 /var/www/wiki/w/includes/MediaWiki.php(508): MediaWiki->main()
#22 /var/www/wiki/w/index.php(41): MediaWiki->run()
#23 {main}