Probably have to delete and reinstall. Happened to me with a different app.
Having issues with opening nostr:npub12vkcxr0luzwp8e673v29eqjhrr7p9vqq8asav85swaepclllj09sylpugg
Latest App Store version 2.1.49
iOS version 17.7.1
https://video.nostr.build/1de5a9eddcbc584615a016a148eef5996575442bf4a44c490cf2087bf695ef36.mp4
Discussion
Already tried that, just happened again after awhile