When it shows the popup to pay invoice it is supposed to fire off a Nostr event, which your signer would sign and this is how we fetch the hex pubkey for your Nostr account. I wonder if something with Alby got in the way and it didn’t properly sign the event. It definitely shouldn’t have, if you agreed to signing? If you are at all familiar with the browser developer console and you try with other accounts, please let us know if you are not redirected to a thank you page and see any client-side errors in your browser! Thank you 🙏