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In this case, WordPress caught an error with one of your plugins, littlebot-netlify.
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Error Details
An error of type E_ERROR was caused in line 125 of the file /wordpress-site/wp-content/plugins/littlebot-netlify-master/includes/class-lbn-post.php. Error message: Uncaught ArgumentCountError: Too few arguments to function LBN_Post::save_post(), 1 passed in /wordpress/core/5.2/wp-includes/class-wp-hook.php on line 286 and exactly 3 expected in /wordpress-site/wp-content/plugins/littlebot-netlify-master/includes/class-lbn-post.php:125
Stack trace:
Email from Wordpress: