There’s your problem right there, dude.
https://image.nostr.build/cd7a12ed7217ac33d3eb9331cd70d5d3db935a049396f53a765c9684c4b41e8a.jpg 

 Should say error: warning 

 That, my friend, is the most helpful error message ever. Frame it. 

Kidding aside, we figured out that it was an issue with the receiver's wallet. We do, however, need a better error message.