So I built an electric motor powered longboard,It's basically an rc car,But mounted to the board,I have a turnigy sk3 brushless outrunner motor,Hobbywing 150a ESC and two 5000mah LiPo batteries,and a transmitter/receiver.I set everything up and It worked and ran properly,Then I turned it off,and next time I tried to use it,The ESC lights up green and the motor jolts several times,Then the ESC goes to flashing red and nothing works,The receiver light is on but nothing

Sounds like 2 different things...The beeping sounds like an abnormal voltage error. The flashing red is abnormal throttle signal.