Sagepay upgrade error in Magento 2

I am using the customweb sagepay module.

Recently i updated the module version, after that i am unable to place the order.

I am getting 500 internal server error when place order button is clicked.

I checked in exception log

This is the error i am getting.

 Report ID: webapi-5d3551e5eb951; Message: Rolled back transaction has not been completed correctly.  

Can anyone help me on this issue please.