Support team I install plugin "Infinite SEO"

Hi Support team

I install plugin "Infinite SEO" and then I add/edit my post and Save

that error message show like this

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

Warning: Cannot modify header information - headers already sent by (output started at /home/saratit/domains/saratit.com/public_html/wp-content/plugins/wpmu-dev-seo/wds-files/wds-sitemaps/wds-sitemaps.php:42) in /home/saratit/domains/saratit.com/public_html/wp-includes/pluggable.php on line 881

Help me please