Error 13E on the GOTRAX GX3 scooter means “Front drive motor is stalled or faulty.” Most likely cause: a fault in the motor, its wiring or the controller's motor current sensing. Try this first: switch off and restart.
The controller can't run the motor properly. It can come from the motor, its cable or the controller. These are inside the wheel and deck, so leave them to support.
Step-by-step checklist
Work from the top. Steps go from free and easy to shop jobs. Switch the scooter off before touching any connector. Tick each step as you go. Your progress is saved on this device.
When it's time for a shop: if you've worked through every step and the problem is still there, contact the brand's support or an authorized service center. Bring your notes on when it happens, plus the code.