×Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. You likely forgot to export your component from the file it's defined in, or you might have mixed up default an..

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Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: 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 the render method of `App`.

 

react 열심히 만들다가 다음과 같은오류가 나면 보통 세가지정도 보편적인이유이다

1.해당 컴퍼넌트내에 링크 잘못연결

2.해당 컴퍼넌트내에 대소문자 오류

3.app.js에 빈 폴더 라우팅