Application error: a client-side exception has occurred in https://react.dev/learn/writing-markup-with-jsx

[rckm]

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So i was looking around the new documentation and playing with built-in code editor. After i tried to delete or change some HTML tags it shows me this

I tried to click the 'Reload' button where alert is coming

And after clicking 'OK' it's giving me Application error: a client-side exception has occurred