Zones 1, 2, 3, and 5 ran as scheduled the past two morning. Zone 4 appears to be running on app and controller. However, pump and zone don’t run.
You might want to temporarily move zone 4 to another zone to see if it works. If so, it might be something with the controller. If not, it might be with the wiring such as a wire may have come loose. How did you confirm the pump did not run when the zone did not work?