Matt on Nostr: Does anyone know how to resolve the "unreachable external wallet" error in ...

Does anyone know how to resolve the "unreachable external wallet" error in npub1yzvxlwp7wawed5vgefwfmugvumtp8c8t0etk3g8sky4n0ndvyxesnxrf8q (npub1yzv…rf8q) ? It's an off and on problem. I have no idea how to reproduce it.