인프런 커뮤니티 질문&답변

사진 확대가 안되나요? 복사한 에러메시지는 다음과 같습니다.

backend.js:2758 Uncaught TypeError: Cannot convert undefined or null to object

    at Function.keys (<anonymous>)

    at processState (backend.js:2758)

    at getInstanceState (backend.js:2611)

    at getCustomInstanceDetails (backend.js:2624)

    at backend.js:320

    at EncodeCache.cache (backend.js:254)

    at Object.replacer (backend.js:320)

    at encode (backend.js:3100)

    at encode (backend.js:3101)

    at encode (backend.js:3110)