Have no idea why btcpayserver stoped generating zap receipts after upgrade. Decided to install nostdress instead from nostr:npub1nxa4tywfz9nqp7z9zp7nr7d4nchhclsf58lcqt5y782rmf2hefjquaa6q8 and it's working great.
Discussion
Would be nice to have a ready easy to install umbrel package for nostdress.