When you were charging it, was the charger red and go green like normal charging or green right away?
Another test to determine if it's the bms or controller is to open the battery pack and unplug the bms, connect the battery output directly into the controller. If the board turns on and balances then it's a bms problem, if not then it's the controller.
Also check the battery pack voltage, should be around 62 volts.
The bms controls the on-off function.
If the bms is your problem and you can't get a bms quickly, do a bms bypass to get you riding temporarily.