Just a guess, but I'm assuming you're not on the latest version of Phoenix. Mine says something similar. I'm using Google Play to update my apps, if  nostr:npub1z4m7gkva6yxgvdyclc7zp0vz4ta0s2d9jh8g83w03tp5vdf3kzdsxana6p is using Obtainium or zap.store, he might be a bit ahead in versions