Checkout page hanging during test

[cindy]

I am working with a test Wordpress site to integrate my client's Click and Pledge account with Woocommerce, but the checkout page is hanging up without even giving an error.

I am using the Click and Pledge Woocommerce Wordpress Module. I added my test site to the account API information in the Click and Pledge Account settings (sbtestingtwo.wpengine.com). I enabled Click and Pledge and set the payment gateway to test.
I went to checkout, filled in all required fields. I used 4111111111111111 as the test card number, my name, 154 for the 3-digit code and Oct. 2015 for the expiration date.
I clicked Place order and the screen is just spinning. It's not going anywhere. (see attached screenshot -- it never changed until I hit "Back")
I checked for plugin and theme conflicts by doing this on a clean install of Wordpress twenty twelve with just Woocommerce and the Click and Pledge plugin enabled.
Is it a problem with the test (i.e., should I have a different configuration or test credit card), or is there a bug with the plugin?

[CnP.Support]

Good Day!

Would you please create a support ticket with the details listed below:

Admin:

Site URL:
User Name:
Password:

FTP:

Host:
User Name:
Password:

We need to login and review what is going on.