我有一个使用expo工具在react native中开发的项目。现在，我正在尝试在EXPO中导入项目，但遇到以下错误，
F:\ProjectPath>expo start
Starting project at F:\ProjectPath
Expo DevTools is running at http://localhost:19002
Error: Missing app.json. See https://docs.expo.io/
No Expo configuration found. Are you sure this is a project directory?