I am unable to complete a purchase through Xsolla because it is asking for additional verification. What do I do?

For verification purposes, you will need to enter the four-character code in order for the transaction to go through successfully.

When you initiated payment, a small amount of money (less than 1 USD) is blocked from your card.

IN THE DETAILS OF THIS TRANSACTION you should be able to see the 4-character code.

You can view this code by reviewing the transaction on your online banking or you can contact your bank and have them read you the 4-character code in the transaction details.
Once you have the 4-character code, go ahead and enter it on the payment page.