Lots of complaints with similar issues. Sounds like it got too hot from chain
vaping, or a sensor is shot.
GV FAQ says "You need to take out the
batteries (if it is replaceable) and let it sit for 30 minutes. If your device becomes too hot that you can't touch it, or if the mod keeps on showing overheat protection even if it is not hot, please (contact us)."
Edit: And welcome to ECF

I didn't notice this was in the New Members forum.