Hard time with the React Course

I am trying some of these React lessons at work but I am unable to see anything on the ‘build in html’
I get the following. Was I supposed to download and install something? I assumed react was build into the page for testing. It works fine at home, is it possible work firewall is blocking the page?

localhost|690x434

Which exercise is the? Please post a link to the exercise.

The error message gives a hint of what is wrong with your submitted code…

<h1>(2 + 3)</h1>

its exercise 4, but I dont think my code is the problem, the right window pane is always reading

‘the connection was reset’, even when the code is correct.

Best use the Bug Reporting form on the lesson page to notify CC of the issue.

Thanks, I will try that.

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