Paypal stop functioning

Using HC8 latest build 10 when customer try to signup or use payment form, once the payment made at paypal end then it show error if we click button return merchant . What we can see that payment been captured and receive in merchant account but there is no history of it in the control panel. 
I need solution for this problem ASAP.

Paypal have made changes in their API due to some additional parameters call at their end it broke the existing integration with HC panel. We have sorted out this problem and new solution is included in HC8 build 11.