That means you have a 3rd party plugin that’s affecting how the WordPress REST API works. I can see that the WooCommerce requests on your checkout block are also failing. Here is the response from your server:
{
"status": "error",
"error": "Restricted",
"error_description": "Sorry, you are not allowed to access REST API.",
"error_reason": "With the free plan, only WordPress default endpoints can be authenticated. You can upgrade to the All-Inclusive plan to securely access the custom built or 3rd-party plugin REST API endpoints. Reach out at *****@xecurify.com in case of any questions."
}
Kind Regards