Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email....
We have all seen the e-mails and nothing freaks clients out more than seeing this sort of message, usually regarding a plugin or two. However, the truth of the matter is that usually this message is triggered by one major issue....Memory.
To stop these errors from triggering e-mails non-stop, simply add the below code to your wp-config.php file.
define( 'WP_MEMORY_LIMIT', '256M' );