Error generating PDF: Invalid request parameters

Stack trace:
#0 /var/www/concealedwines.se/html/wpsysfiles/wp-includes/class-wp-hook.php(324): handle_generate_wine_pdf()
#1 /var/www/concealedwines.se/html/wpsysfiles/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()
#2 /var/www/concealedwines.se/html/wpsysfiles/wp-includes/plugin.php(517): WP_Hook->do_action()
#3 /var/www/concealedwines.se/html/wpsysfiles/wp-admin/admin-ajax.php(207): do_action()
#4 {main}