Thread:Extension talk:Validator/Fatal error: Validator depends on the ParamProcessor library/reply (3)

I've got this error too.

Fatal error: Uncaught exception 'Exception' with message 'Validator depends on the ParamProcessor library.' in /var/www/wiki/extensions/Validator/Validator.php:31 Stack trace: #0 /var/www/wiki/LocalSettings.php(151): require_once #1 /var/www/wiki/includes/WebStart.php(136): require_once('/var/www/wiki/L...') #2 /var/www/wiki/index.php(46): require('/var/www/wiki/i...') #3 {main} thrown in /var/www/wiki/extensions/Validator/Validator.php on line 31

Is there a simple way to install ans setup ParamProcessor library?

bkb