I think I managed to get it working now, with Coinos. No idea if it's good or not, we'll see if and when someone zaps me some sats.
It still isn’t possible to zap you.
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Thanks. I guess the address expires when I close the receive page, or it isn't the right format.
Try now, while I have it open
#[4] I think I got it now, seems like it was the "username", ElectronicsQuestions@coinos.io that should go into the lightning address field.