1. undefined is not an object (evaluating '_core.ThemeColors.light') -> react-native start --reset-cache 시도 : 해결완료 -> ReferenceError Can't find Variables : React ㅠㅠ : 파일위치지정 실패 -> Can't find Vraibles : Image : import { Image } from 'react-native'; 추가 // 'react-navigation'이아님에 주의!!