Have you previously set up a clearnet BTCPayServer connected to your start9 LN node?
Discussion
Not yet. I haven't used btcpayserver since 2021. That was with a VPS, but isn't active anymore.
Ok, it is a few steps, but none that are hard. Once BTCPayServer is running and accessible on clearnet it is 2 clicks.
I use a reverse tor proxy to make my tor BTCPayServer public, I will write a tutorial