Although it looks like the nostrpubkey of the lnurlp endpoint was not the issue. He has a 302 redirect setup for his lightning address https://jb55.com/.well-known/lnurlp/jb55 to https://sendsats.lol/.well-known/lnurlp/jb55

The redirect works fine in a browser but it looks like its not returning a CORS header, so when noStrudel tries to fetch the endpoint it gets blocked by CORS

It should be fixed now though. I just made it use a cors proxy as a fallback if the LNURL dose not have the CORS header.

ending though: CORS will be the death of web apps