A problem with fetch API and map function in React JS, please help me!

Curriculum Help
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I use axios to fetch data from my mongodb, i have a little problem here is the function map i use to access data and render it, it is ‘Cannot read property ‘map’ of undefined’.

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Where do you render the Post component? Please post actual code and not screenshots.

Thank you.

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Oh my god thank you so much, because this is the first time i put my question on this community, now i can solve my problem, thank for that