Unable to spawn entity in Gazebo

Hello, I am trying to complete ROS2 Basics in 5 Days but am stuck at the beginning of the course and unable to finish ROS2_Basics_Demo. As directed, I open up a new shell and type in the commands as directed. I then open up a second shell and type in the following:

source /opt/ros/crystal/setup.bash
source ~/ros2_ws/install/setup.bash
ros2 run mara_utils_scripts spawn_entity

After the last command, Gazebo crashes. This is what I get:

The first shell is on the right and the second shell in on the left below Gazebo. Does anyone know what is going on? ANY help would be appreciated. Thanks!

Here are some of the errors I’m getting on the first shell:

Hello @cesar.rodriguez,

I see that you are doing the course in ROSDS. Could you please share the ROSject with me so that I can have a look?


Sure thing. Here it is: