Hi,
Since yesterday moing (9th May 10:30am) all orders placed through SagePay using the SagePay Form plugin (v2.3.2) have been failing to mark as processing.
On trying a test order we've discovered that on retuing to the website after payment the site just displays the number 1 on a completely blank page.
This has happened before and I think that was due to a protocol change at SagePay.
website: http://emptybox.co.uk