Noise when pedaling

[Prob]

My chain jumped off the chain ring then it developed a winning sound only when I was pedaling turned back from my ride then the noise went away. Done 40 miles the day before no trouble. Any ideas please.

 

[AOSTIRMOTOR EBIKE]

Um, did the chain come off during the ride? So it makes a noise, maybe your dial control cable is too tight or too loose, maybe you can adjust it.Did the chain come off during the ride? So it makes a noise, maybe your dial control cable is too tight or too loose, maybe you can adjust it.