Resolved: Whole house is tripped at times when Bolt is charging

As some of you know from my other posts, I had my basement finished which required a new electric panel in the basement. I also at the same time got my Bolt and had a 240 V circuit at 50 amp installed in my existing panel.

Now whenever I have the dryer on while the car is charging the whole garage panel trips from the outside panel. That was kind of understandable, but today it tripped when I was just using the microwave.

It may be that my electrician does not know what he is doing.
I asked him when he installed the charger and he told me at the time that all is fine with the 50 amp circuit.
But he is now saying that I need to get more power from the electricity company. That will be 1000s of dollars!

I am attaching photos of my outside panel and the one in the garage. The garage one has outdated labeling. The lowest left breaker, 50 amp, is for the car.