Hey Ninebot, Xiaomi, Segway Mini / Mini Pro users,
here is the downgrade pack for your device (Xiaomi, Ninebot, Segway Mini / Mini Pro) with an documentation how to do it. It will downgrade your device from firmware version 1.2.8 back to 1.1.7.
YOU DO THIS AT YOUR OWN RISK, I'M NOT RESPONSIBLE FOR BRICKED DEVICES OR THINGS THAT HAPPEN TO YOU OR YOUR DEVICES BECAUSE OF THIS DOWNGRADE!
It looks like Ninebot has changed something in the App. You need the Ninebot App < 3.6. For And