Biz on Nostr: Digging deeper, it seems to be related to the npub being sent by Pokey to Amber in ...

Digging deeper, it seems to be related to the npub being sent by Pokey to Amber in the "current_user" Intent field for Relay auth. Pokey is sending an empty string which Amber is converting to a hex string and signing the Auth event with, which in turn is being rejected by the Relay, which causes the error. At least *I think so* - because debugging IPC is complicated! When I change the null check in Amber to be isNullOrEmpty() then the error goes away.