Happy Holidays!
If you have faulty electronic component, you go to electronics engineer and not to bike mechanic. It is that simple. I can bet the bike shop that will hire at least one electronic engineer will be most popular bike shop for serious cyclists in any given area, and most of these failures are quite basic.
Absolute trash bike, but super interesting to see that you can buy a complete turn key bike in one click with that groupset on. The only good thing on that bike is the groupset.