Allow empty Resume Content (resume_content) field in WP Job Manager (to prevent white screen of death)

functions.php

<?php

// This filter handles preventing fatal error from empty value in post_content
add_filter( 'submit_resume_form_save_resume_data', 'submit_listing_allow_empty_resume_content', 99999, 5 );

/**
 * Allow empty Resume Content (resume_content) field in WP Job Manager
 *
 * If you're using the Field Editor plugin, and want to configure the Resume Content (resume_content meta key) field
 * to only show for specific packages, you will need this code to prevent a white screen of death, as the core
 * WP Job Manager plugin requires this value to not be NULL.  This function will filter the core WP Job Manager
 * resume data, and set the post_content (used for resume_content meta key) to an empty string, instead of NULL.
 *
 *
 * @param $resume_data
 * @param $post_title
 * @param $post_content
 * @param $status
 * @param $values
 *
 * @return mixed
 */
function submit_listing_allow_empty_resume_content( $resume_data, $post_title, $post_content, $status, $values ){
	/**
	 * If we disabled the resume_content meta key field, the post_content value will be NULL,
	 * so we set it to an empty string to prevent any fatal PHP errors (or blank screen on preview)
	 */
	if( $resume_data['post_content'] === NULL ) {
		$resume_data['post_content'] = '';
	}
	return $resume_data;
}

You can find this same code for Job Listings here:
https://gist.github.com/tripflex/c2bfdb855f6516263a9825dbacbedea4