Maybe there was a temporary issue with their node. I have tried my own node with exact amount of sats, a getalby lightning url, as well as two different custodial lightning wallets, Coinos and Strike. All failed.
Weird. I’ve been able to withdraw my nostr:npub19xxmzjug3e9uygd6ux7uglrcwj83fudjj6l9c4jpssjm89ypfflqnl47cd rewards to my nostr:npub126ntw5mnermmj0znhjhgdk8lh2af72sm8qfzq48umdlnhaj9kuns3le9ll Core Lightning node. Twice. Are you copy pasting in a Lightning invoice? I had to make an invoice for the exact amount of sats in my nostr:npub16s47l3qakjc204n9weuzdptv3ewadgvasgz2gm4mus8ftp0ss9pqm4ux4x rewards and paste it into Oshi.
Discussion
I’ll have to try it again later today.