We did some zap tests on this note… we made six attempts to⚡zap this note, at 0xa870c7ba9@bwb.io, over a period of about 1 hour. In each case, we found that your lightning address server did not respond correctly. (The failure point was when we did a GET request to your specified callback URL: https://bwb.io/lnurlp/api/v1/lnurl/cb/gHe99g ). Your server did not produce an invoice, thus the zap failed. The error we got was "unknown error". You might want to look into using a cloud-based Lightning node which is optimized for Nostr zaps, to get your zaps working.