Gen 2 controller issues, app showing system running but no water

Sounds like an issue with the common wire(s) because it affects all zones. The common wire is the link to all.

Because it worked for a period of time, then stopped, it could be a dreaded intermittent (loose connection).

I suggest you go to the valves unbundle the common wires then run a wire from the common connection at the Rachio main box to a single valve, then try a quick run on the valve you selected.