I was developing a chat app in practice using react-native expo, but when I suddenly executed "expo start" in the usual development flow, the error "could not connect to development server" was displayed.
If you have experienced the same error and know a solution, I would appreciate it if you could help.
Since I was linking with aws-amplify just before, I thought that the one installed due to that relationship was the cause of the error, but since the application starts normally in the browser, only the iOS simulator does not work (Android is in a situation where it downloads endlessly and does not start)
What I tried
1)Delete the cache with expo start -c
2)As the error says, npm start and then reload is repeated.
3)Delete 19000 with the kill command, thinking that it is a port problem.・ Npm install・ Rm -rf node_modules / && rm -rf yarn_lock / && yarn install && cd ios && pod install
Nothing worked, I cannot come up with any good idea to solve it. All solutions from the research are failed. What else could I do?
Referenced links
Could not connect to React Native development server on Android
Could not connect to the development server react native ios simulator Node
package.json↓
{"main": "node_modules/expo/AppEntry.js","scripts": {"start": "expo start","android": "expo start --android","ios": "expo start --ios","web": "expo start --web","eject": "expo eject","test": "jest --watchAll" },"jest": {"preset": "jest-expo" },"dependencies": {"-": "^0.0.1","@expo/vector-icons": "^12.0.0","@react-native-async-storage/async-storage": "^1.15.11","@react-native-community/masked-view": "0.1.10","@react-native-community/netinfo": "^6.2.1","@react-navigation/bottom-tabs": "5.11.2","@react-navigation/native": "~5.8.10","@react-navigation/stack": "~5.12.8","aws-amplify": "^4.3.6","aws-amplify-react-native": "^6.0.1","cli": "^1.0.1","expo": "~42.0.1","expo-asset": "~8.3.2","expo-constants": "~11.0.1","expo-font": "~9.2.1","expo-linking": "~2.3.1","expo-splash-screen": "~0.11.2","expo-status-bar": "~1.0.4","expo-web-browser": "~9.2.0","g": "^2.0.1","react": "16.13.1","react-dom": "16.13.1","react-native": "https://github.com/expo/react-native/archive/sdk-42.0.0.tar.gz","react-native-gesture-handler": "~1.10.2","react-native-reanimated": "~2.2.0","react-native-safe-area-context": "3.2.0","react-native-screens": "~3.4.0","react-native-web": "~0.13.12" },"devDependencies": {"@babel/core": "^7.9.0","@types/react": "~17.0.21","@types/react-native": "~0.64.12","jest-expo": "~41.0.0-beta.0","typescript": "~4.3.5" },"private": true}