If no light : 12v acid battery is dead.
Pneumatic assistance on brake pedal must be precharged when start begin ... but the battery (12v acid) must be in good condition to release this process.
You can hear this sound when you cut the car and lift off the pedal brake = brooooooo sound is hear.
We have many report about this in Leaf section and Soul EV section on my forum.
The classic case is the dealer that it has let the car ON with 12v ACID only (no green car with arrows) ... and DON'T HAVE turn OFF the A/C Button.
I have this case with my professionnal cleaner factory recently (i have cable for 12v ACID in my Soul EV, so i can jump start any car with my Soul EV ... or jump start my car).
The second case is the combinaison of hard task for Soul EV and short time for charge (the time to charge the Acid battery is too short, it's a slow charge).
In the second case, many users don't know that the car MUST be with the green light car and arrows when you are in the car to phone or study (or eat) like 30min to 1 hour.