Notranja napaka

Detected bug in an extension! Hook FBConnectHooks::SpecialListusersHeaderForm failed to return a value; should return true to continue hook processing or false to abort.

Backtrace:

#0 /var/www/www.e-studij.si/includes/specials/SpecialListusers.php(202): wfRunHooks('SpecialListuser...', Array)
#1 /var/www/www.e-studij.si/includes/specials/SpecialListusers.php(279): UsersPager->getPageHeader()
#2 [internal function]: wfSpecialListusers(NULL, Object(SpecialPage))
#3 /var/www/www.e-studij.si/includes/SpecialPage.php(791): call_user_func('wfSpecialListus...', NULL, Object(SpecialPage))
#4 /var/www/www.e-studij.si/includes/SpecialPage.php(559): SpecialPage->execute(NULL)
#5 /var/www/www.e-studij.si/includes/Wiki.php(254): SpecialPage::executePath(Object(Title))
#6 /var/www/www.e-studij.si/includes/Wiki.php(64): MediaWiki->handleSpecialCases(Object(Title), Object(OutputPage), Object(WebRequest))
#7 /var/www/www.e-studij.si/index.php(117): MediaWiki->performRequestForTitle(Object(Title), NULL, Object(OutputPage), Object(User), Object(WebRequest))
#8 {main}