Reply To: Ultimate Member Register Form shortcode is Cut

It has a critical PHP error both with WoodMart and default theme that breaks the page completely. You can check it by enabling debug mode in the wp-config.php file. The plugin developers can confirm this if you show them your website with the default theme.
But if you want to return your money, you can request a refund here https://themeforest.net/refund_requests/new

Kind Regards