Exception encountered, of type "Error"
[aAEFwDXyAM2Qgw_N8BAkBgAAAFU] /index.php?action=pdfbook&title=MediaWiki%3ASidebar Error from line 18 of /home/dahuawiki/public_html/extensions/PdfBook/PdfBook.hooks.php: Call to undefined function wfMsg()
Backtrace:
#0 /home/dahuawiki/public_html/includes/Hooks.php(195): PdfBookHooks::onUnknownAction(string, Article)
#1 /home/dahuawiki/public_html/includes/MediaWiki.php(497): Hooks::run(string, array)
#2 /home/dahuawiki/public_html/includes/MediaWiki.php(288): MediaWiki->performAction(Article, Title)
#3 /home/dahuawiki/public_html/includes/MediaWiki.php(735): MediaWiki->performRequest()
#4 /home/dahuawiki/public_html/includes/MediaWiki.php(509): MediaWiki->main()
#5 /home/dahuawiki/public_html/index.php(43): MediaWiki->run()
#6 {main}