@LeonidS the log shows the return URL. It is definitely in webhooks, with all events selected. And, as I wrote above, subscriptions work perfectly. But credits, donations, these fail on return with above error from payments log.

Something isn't right. If I switch to swipe option one (not v3) the donations and credits work, but subscriptions don't. Without changing a thing. Same test keys, just turning on the end point for that version. I have them both in webhooks, just disable the one I'm not using.

UNA 14. A3. Please advise, as I need swipe to work. Thank you.