Build a JavaScript Calculator: CodePen Not Rendering Example

Tell us what’s happening:
The example CodePen doesn’t exist. When I click it I see a pen which has a white background, and nothing on top except for the test suite. When I changed the view to editor (taking care not to look at the code itself), the calculator appeared in the preview, but it doesn’t show up in full page or details view.

When I go to that challenge and click on the example pen, the calculator loads in codepen just fine for me.

I don’t know why it doesn’t for you. There is nothing FCC can do that would prevent a working pen from loading. The most logical assumption would be that there is something wrong on your computer or browser that is preventing codepen from working properly. What browser are you using? I would recommend Chrome, make sure you have the latest version, reboot your computer, and try again. If it still doesn’t work, maybe open up the console (ctrl-shft-j or whatever) and see if there are any errors.