Topic: Error in admin

Hello guys i see this error in my setting page:

Notice: Undefined index: Min posts for sig in /web/htdocs/www.punbb-italia.it/home/admin/settings.php(863) : eval()'d code on line 13

Notice: Undefined index: Min posts for sig info in /web/htdocs/www.punbb-italia.it/home/admin/settings.php(863) : eval()'d code on line 13

Re: Error in admin

since you installed a certain extension?