PayPal Pro does not process card after confirming order

Hi,

I am using Opencart Version 2.0.3.1. Since PayPal Pro is already added to the default payment extensions I am using it. The issue is after I enter my credit card details and click on Confirm Order, nothing happens. I am not sure what the issue is. Please help. I opted for PayPal Pro since Express Checkout requires users to have a PayPal account in case they need to use their credit cards. This issue has forced me to Disable the PayPal plugin until I find a solution. Please help, little urgent. Let me know if any additional information is needed.