Toyota Prius 2001 does not start

Toyota Prius 2001 (232K's) 12V battery discharged over night with one of the lights ON.
Jump started car and run for 3ks. No problems and then parked.
Charged the 12v battery, reconnected but the car did not start. No errors on screen,
Had run scanner to find faults but no faults reported.
Car still does not start even when no error messages on screen.
Has someone come across any such problems?
Need help to resolve and get the car back on road?