I notice that's my first react native app and this is what I've when I just try to import the first components :
"React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: %s.%s%s, object, You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.Check your code at App.js:9., in App (created by ExpoRoot) in RNCAppearanceProvider (at src/index.tsx:70) in AppearanceProvider (created by ExpoRoot) in ExpoRoot (at renderApplication.js:45) in RCTView (at AppContainer.js:109) in DevAppContainer (at AppContainer.js:124) in RCTView (at AppContainer.js:135) in AppContainer (at renderApplication.js:39)* [native code]:null in __expoConsoleLog