Getting a preg_match error when exporting

When exporting from the admin we are getting an alert at about 90% finished. – “<p>There has been a critical error on this website. Learn more about troubleshooting WordPress.</p>”.

I checked the logs and see the following error – “Uncaught TypeError: preg_match(): Argument #2 ($subject) must be of type string, array given in */wp-content/plugins/woo-order-export-lite/classes/PHPExcel/Cell/DefaultValueBinder.php:88”