3주차숙제1.다 만들고 엑스포앱에서 소개페이지버튼 누르면 에러가떠요;;

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3주차숙제1.다 만들고 엑스포앱에서 소개페이지버튼 누르면 에러가떠요;;

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ReferenceError: Can't find variable: useEffect

This error is located at:

in AboutPage (created by SceneView)

in StaticContainer

in EnsureSingleNavigator (created by SceneView)

in SceneView (created by CardContainer)

in RCTView (created by View)

in View (created by CardContainer)

in RCTView (created by View)

in View (created by CardContainer)

in RCTView (created by View)

in View

in CardSheet (created by Card)

in RCTView (created by View)

in View (created by AnimatedComponent)

in AnimatedComponent

in AnimatedComponentWrapper (created by PanGestureHandler)

in PanGestureHandler (created by PanGestureHandler)

in PanGestureHandler (created by Card)

in RCTView (created by View)

in View (created by AnimatedComponent)

in AnimatedComponent

in AnimatedComponentWrapper (created by Card)

in RCTView (created by View)

in View (created by Card)

in Card (created by CardContainer)

in CardContainer (created by CardStack)

in RNSScreen (created by AnimatedComponent)

in AnimatedComponent

in AnimatedComponentWrapper (created by Screen)

in MaybeFreeze (created by Screen)

in Screen (created by MaybeScreen)

in MaybeScreen (created by CardStack)

in RNSScreenContainer (created by ScreenContainer)

in ScreenContainer (created by MaybeScreenContainer)

in MaybeScreenContainer (created by CardStack)

in RCTView (created by View)

in View (created by Background)

in Background (created by CardStack)

in CardStack (created by HeaderShownContext)

in RNCSafeAreaProvider (created by SafeAreaProvider)

in SafeAreaProvider (created by SafeAreaInsetsContext)

in SafeAreaProviderCompat (created by StackView)

in GestureHandlerRootView (created by GestureHandlerRootView)

in GestureHandlerRootView (created by StackView)

in StackView (created by StackNavigator)

in Unknown (created by StackNavigator)

in StackNavigator (created by StackNavigator)

in StackNavigator (created by App)

in EnsureSingleNavigator

in BaseNavigationContainer

in ThemeProvider

in NavigationContainerInner (created by App)

in App (created by ExpoRoot)

in ExpoRoot

in RCTView (created by View)

in View (created by AppContainer)

in RCTView (created by View)

in View (created by AppContainer)

in AppContainer

in main(RootComponent)

at node_modules\expo\build\environment\react-native-logs.fx.js:null in error

at node_modules\react-native\Libraries\Core\ExceptionsManager.js:null in reportException

at node_modules\react-native\Libraries\Core\ExceptionsManager.js:null in handleException

at node_modules\react-native\Libraries\Core\setUpErrorHandling.js:null in handleError

at node_modules\expo-error-recovery\build\ErrorRecovery.fx.js:null in ErrorUtils.setGlobalHandler$argument_0

at node_modules\@babel\runtime\helpers\regeneratorRuntime.js:null in tryCatch

at node_modules\@babel\runtime\helpers\regeneratorRuntime.js:null in <anonymous>

at node_modules\@babel\runtime\helpers\regeneratorRuntime.js:null in tryCatch

at node_modules\@babel\runtime\helpers\regeneratorRuntime.js:null in invoke

at node_modules\@babel\runtime\helpers\regeneratorRuntime.js:null in PromiseImpl.resolve.then$argument_0

at node_modules\promise\setimmediate\core.js:null in tryCallOne

at node_modules\promise\setimmediate\core.js:null in setImmediate$argument_0

at node_modules\react-native\Libraries\Core\Timers\JSTimers.js:null in _allocateCallback$argument_0

at node_modules\react-native\Libraries\Core\Timers\JSTimers.js:null in _callTimer

at node_modules\react-native\Libraries\Core\Timers\JSTimers.js:null in _callReactNativeMicrotasksPass

at node_modules\react-native\Libraries\Core\Timers\JSTimers.js:null in callReactNativeMicrotasks

at node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:null in __callReactNativeMicrotasks

at node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:null in __guard$argument_0

at node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:null in __guard

at node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:null in flushedQueue