Ok I think I fixed the lnurl error

The server was hanging because before giving out an invoice it queries mempool.space for the latest feerates and uses those to calculate minimum "receive" amounts

But I got rate-limited by mempool.space (I think) for querying for feerates too often

I changed the logic so it only queries them a maximum of once every 10 seconds

Try again and let me know if you encounter any other bugs