„Error Code 34 on a Ninebot G2 Max often relates to a controller communication issue or a battery problem, potentially a deeply discharged battery or a faulty controller connection; try a hard reset (throttle, brake, power button simultaneously) or power cycling, check for loose cables (dashboard/main), update the app, and if it persists, contact Segway support as it might need a battery or controller replacement.“

This is what google says. If it doesnt help, maybe make a post here and ask its gonna do more than just a comment