error in error.log

Hello! In my error.log show an error

[22-Jul-2021 03:02:12 UTC] PHP Fatal error:  Maximum execution time of 30 seconds exceeded in /home/name/public_html/site.com/wp-content/plugins/all-in-one-wp-security-and-firewall/classes/wp-security-backup.php on line 79

Please says me, what’s a error? and how fix it