Often, my code displays a Parse Error in the output window even though it is exactly the same as the provided example. Here is a screen shot of one example, along with the console output from Chrome Dev Tools.
That's how they have it set up. They give you a program with errors and you're supposed to fix it. The "window" automatically updates based on the code that is there.
I'm getting often the same issue on all the PHP course : Uncaught Error: Codex invalid state: cannot send commands while not in ready state.
Any future bugfix ? Reload the page each 5 min is not very comfortable.