Browsing this thread, I am also having issues with Snap Affiliates since moving to ZC1.5.7. I cannot list the orders I want to pay; I have commissioned orders from May 2020 through the end of December 2020, and I can list those, but when I click Pay nothing comes up. I need to settle up with my affiliate and remembering that I've paid those commissions - but am unable to mark them paid - will mess me up the next time I go to pay that affiliate. Is there any work being done on this?