I am not sent to paypal

After installing WooCommerce PayPal Powered by Braintree Gateway, and connecting to braintree in the plugin I visit checkout page to try a purchase. but after clicking “Place Order” I am not sent to paypal.

pick item and try page https://stepbystepvirtualtours.com/checkout/

https://wordpress.org/plugins/woocommerce-gateway-paypal-powered-by-braintree/