This morning I went to the garage to pick up my car and the seats adjusted without any problems.
I drove the car a few miles, and the seats again couldn't be adjusted. This happened a few more times.
In short, the seat adjustments work sometimes, and then sometimes they don't.

In the owner's manual, I identified two fuses responsible for the electric seat adjustments, numbers 21 and 22.
Unfortunately, I couldn't find the seat adjustment relay.