NFC doesn't work on new Series 3 fixtures or after replacing NFC card
New NFC fails
NFC communication fails on a new fixture or (more likely) after replacing the NFC card.
Just change settings
The NFC card is blank until a configuration is uploaded to it. If it's a new card, it will appear to have failed with an error until you make any simply change like DMX address. This will force a config upload for the NFC card to share and will then work fine.