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You hit this exactly 47 days ago
TypeError: Cannot read properties of undefined (reading 'map')
Added || [] fallback to the API response before rendering the list.
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Access-Control-Allow-Origin missing
Added the cors middleware with credentials: true
Preflight request failed Option
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DebugDiary — Déjà Vu!
94% match found from 47 days ago
React is attempting to call `.map()` on the `users` array before the asynchronous fetch request completes. Since the initial state is `null` instead of `[]`, the runtime throws a TypeError when accessing properties on null.
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