UI5 extension project clone到WebIDE里后报找不到.project.json错误消息的处理

Suppose you try to create a new extension project based on one existing project: This is caused by the fact that the necessary project json file is not created by standard development for My note application. All you need to do is to create a .project.json file manually and paste the following source code:

{
  "translation": {
    "translationDomain": "",
    "supportedLanguages": "en,fr,de",
    "defaultLanguage": "en",
    "defaultI18NPropertyFile": "i18n.properties",
    "resourceModelName": "i18n"
  }
}

After that the button will be available again: