Please help. I bought a flyer uproc 8.7 bike from a stranger, when I bought it I rode it for 2-3 minutes everything was fine. But when I brought the bike home and a few days later I decided to ride it, I turned on the bike and saw the message Dem mode active 1E-01, and after 5 minutes of riding the assistant turned off. This continued more than once. What could be the problem and how to solve it?
Thank you
Thank you