Error after instaling Infinite Seo

When i installed the pluggins it appear this warning on the top of the admin panel;

Warning: set_time_limit() has been disabled for security reasons in /usr/home/likehomemallorca.com/web/wp-content/plugins/wpmu-dev-seo/wds-files/wds-sitemaps/wds-sitemaps.php on line 42

How can i fix it?

Thnks