Services Quiz. Gradebot Fails to compile the package. How fix it?

[oleg.a.kuvaev]

Greate
My solution for this mistake:

1. cd ~/ros2_ws and rm -rf build install log
2. colcon build
3. Verify in simulations
4. Again cd ~/ros2_ws and rm -rf build install log
5. Sent to GradeBot WITHOUT colcon build

Profit