XRP has a few different requirements, but one that is regularly overlooked is the 20 XRP minimum.
An unfunded Ripple (XRP) wallet requires a minimum of 20 XRP for the initial deposit.
If your exchange's output amount is less than 20 XRP for an unfunded XRP wallet, the exchange will not complete. Please be sure that all of your outgoing XRP funds are at least 20 XRP when sending to an unfunded XRP wallet.
ShapeShift wants you to have the best possible experience when it comes to exchanging your digital assets, so let us know if you have any further questions! Our support team is here to help!