Energy accumulator warning light

Dont know much about that car but would suggest checking car battery voltage . Also came across this

Basically the problem is the capacitors for the stop start system are not charging properly it is usually down to poor wiring connections or the alternator output being low there is also a sensor for battery charge this can sometimes be an issue the main start battery not being fully charged can also be a contributing factor use a charger to boost the main battery overnight then clear the fault