[WjbYsf2C9rVf2Np@29b9oAAAABM] /wiki/ MWException from line 245 of /home/vezba/public_html/wiki/languages/Language.php: Invalid fallback sequence for language 'en'

Backtrace:

#0 /home/vezba/public_html/wiki/languages/Language.php(193): Language::newFromCode(string)
#1 /home/vezba/public_html/wiki/includes/Message.php(733): Language::factory(string)
#2 /home/vezba/public_html/wiki/includes/title/MalformedTitleException.php(48): Message->inLanguage(string)
#3 /home/vezba/public_html/wiki/includes/title/MediaWikiTitleCodec.php(312): MalformedTitleException->__construct(string, string)
#4 /home/vezba/public_html/wiki/includes/Title.php(3415): MediaWikiTitleCodec->splitTitleString(string, integer)
#5 /home/vezba/public_html/wiki/includes/Title.php(355): Title->secureAndSplit()
#6 /home/vezba/public_html/wiki/includes/MediaWiki.php(84): Title::newFromURL(NULL)
#7 /home/vezba/public_html/wiki/includes/MediaWiki.php(140): MediaWiki->parseTitle()
#8 /home/vezba/public_html/wiki/includes/MediaWiki.php(777): MediaWiki->getTitle()
#9 /home/vezba/public_html/wiki/includes/MediaWiki.php(523): MediaWiki->main()
#10 /home/vezba/public_html/wiki/index.php(43): MediaWiki->run()
#11 {main}