‘wp_site_health_scheduled_check’ Causes Failure Of Other Scripts

First, turn on WP_DEBUG to get a log of the issue. In your wp-config.php you can add something like:

define('WP_DEBUG', true); //record all the errors
define('WP_DEBUG_LOG',__DIR__.'/wp-content/.wp-debug.log'); //you may want to move this to a more secure location (outside of the web root)
define('WP_DEBUG_DISPLAY', false); //don't show errors on the front end

Second, depending on your server setup, the max_execution_time and memory_limit settings may not match what is used by apache/litespeed/nginx/etc when you use the command line. From the command line, try running php -i | grep "max_execution_time" and php -i | grep "memory_limit" to see what those get set to.

Third, I’ve noticed that wp_site_health_scheduled_check occasionally takes FOREVER to complete (3 to >60 seconds depending on the day). I suspect you are hitting the max_execution_time.

Best of luck!

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