UPDATE: I tried also with Ninebot IAP without succeeding.
When I hit "Flash!" the app returns "Frame Format error!". Below the screenshot:

I used ReFlasher in the past without problems. I've got a new scooter today and it doesn't work anymore. I always get this error on the consolle: [ReFlasher] Starting.. Info : auto-selecting first available session transport "hla_swd". To override use 'transport select <transport>'. Info : The selec...