Internal error

From e-Learning Documentation

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

Backtrace:

#0 /h/cnswww-lss.at/lss.at.ufl.edu/lssweb/htdocs/lssmw-faq/includes/Wiki.php(545): wfRunHooks('CustomEditor', Array)
#1 /h/cnswww-lss.at/lss.at.ufl.edu/lssweb/htdocs/lssmw-faq/includes/Wiki.php(70): MediaWiki->performAction(Object(OutputPage), Object(Article), Object(Title), Object(User), Object(WebRequest))
#2 /h/cnswww-lss.at/lss.at.ufl.edu/lssweb/htdocs/lssmw-faq/index.php(117): MediaWiki->performRequestForTitle(Object(Title), Object(Article), Object(OutputPage), Object(User), Object(WebRequest))
#3 {main}