Hi Jimmy Moawad!

Are you saying that you can't launch the workspace from the launch workspace button beneath the video or can you not launch the workspace preview from within the workspace?

If your problem is the first, I'm sorry, I can't help you. :(

But, if you are receiving this error when you attempt to preview your workspace, I might be able to provide the answer: simple_app.py must be running in the Console when you launch the workspace preview.

Hope this helps. :)