start9 has a built in migration tool that copies the the lnd data directory. i was close / am close to just building my own node. you can migrate the lnd data directory yourself.
Discussion
i wonder if it's a CORS error. i did a curl on https://pay.derekross.me/.well-known/lnurlp/pay and im not seeing the CORS header. it should be being applied via nginx as that config hasn't changed. i wonder if Start9 is removing it.