I am a Robotics Hardware Engineer, very new to ROS. For the unit 4 quiz, I am unable to start the simulation with the wall. When I launch a new simulation by selecting Turtlebot3 in an empty world environment, I don’t get a wall. Did anyone face a similar issue?
The simulations in the courses should start automatically, so there would be no reason to launch a new one unless I’m missing something for that particular quiz.
Can you try reloading and seeing if the simulation starts by itself?
Can you send some screenshots so I can understand your issue better?