I am stuck at the very first part

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<Below this line, add a link to the EXACT exercise that you are stuck at.>

https://www.codecademy.com/courses/learn-html-css/lessons/structure/exercises/what-is-html?action=lesson_resume
<Below this line, in what way does your code behave incorrectly? Include ALL error messages.>

Right-hand side of ‘instanceof’ is not an object

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Hanna

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