Add fields to event JSON+LD to fix warnings from Google Search Console.

the-events-calendar-json-ld-fields.php

<?php

// Add fields to event JSON+LD to fix warnings from Google Search Console.
add_filter( 'tribe_json_ld_event_object', 'ccs_add_data_to_json_ld', 10, 2 );
function ccs_add_data_to_json_ld( $data, $args ) {
	$fields = array( 'location', 'organizer', 'image', 'offers', 'description' );
	foreach ( $fields as $field ) {
		if ( empty( $data->$field ) ) {
			$data->$field = '';
		}
	}
	return $data;
}