Hello,
We have reviewed your website and seen that everything is working perfectly as it should. Normally, WooCommerce does not allow guest checkout by default.
If you want to enable guest checkout then you can check out this WooCommerce Doc https://woocommerce.com/document/configuring-woocommerce-settings/
Moreover, we have removed your website login details from your reply for reasons of security. If we need any login details we will ask you to send those securely.
Best Regards,
ThemeLooks Support Team