[Bug] Intermediate ROS2: simulation stuck on loading

Course Support Intermediate ROS2
1

This is an error report.

Screenshot of the error

Error details

The simulation window in Intermediate ROS2 never finishes loading. It stays on "Loading Simulation..." indefinitely (screenshot attached). The notebook, code editor and terminals all work.

What I already tried:

  • Waited 20+ minutes
  • Reloaded the simulation panel
  • Exited and reopened the course
  • Switched to a different network
  • Disabled uBlock Origin for app.theconstruct.ai and reloaded
  • Checked ~/.bashrc: unmodified (default file, nothing added after The Construct's note)

The simulation in "ROS2 Basics in 5 Days (Python)" loads fine with the same browser and network (Firefox), so it seems specific to this course's environment.

Same symptom as the closed Nov 2024 thread "[Bug] Simulation Not Working" in the Intermediate ROS2 category.

3

Hi Arjun,

we are in the process of getting rid of those Gazebo simulations that crash all the time. We have a new version of the course with a brand new simulation system developed by us.

While we are finishing the final version, you have two options here:

1. Open the course that crashes and then press the “relaunch simulation” icon in the top right corner of the simulation window. This will re-start the sim and launch it properly on the second time for sure

2. Open instead the C++ version of the course (The Construct - Where Your Robotics Career Happens). It is quite similar to the Python version. This version has already the new simulation system and works as charm

I apologize for the inconvenience this may have caused you