“Gradle sync failed：找不到已安装的构建工具。安装Android构建工具版本19.1.0或更高版本“

我正在尝试在Android Studio中打开Ionic2项目，但它在事件日志中出现以下错误：
Gradle sync失败：找不到已安装的构建工具。安装Android版本工具版本19.1.0或更高版本。请参阅IDE日志以获取更多详细信息（帮助|显示日志）
SCREENSHOT

I'm trying to open an Ionic2 Project in Android Studio, but it gives me the following error into the Event Log: "Gradle sync failed: No installed build tools found. Install the Android build tools version 19.1.0 or higher. Consult IDE log for more details (Help | Show Log)" SCREENSHOT

我之前看过一个类似的问题（也许是最新版本之一） Ionic2或Cordova破坏了某些东西 - > https://github.com/driftyco/ionic/issues/10604 ）。

I have seen a similiar problem stated before (also maybe one of the latest release of Ionic2 or Cordova broke something -> https://github.com/driftyco/ionic/issues/10604).

从gradle.build文件或Project Structure更改buildToolsVersion或compileSdkVersion的版本没有帮助。

Changing the version of "buildToolsVersion" or "compileSdkVersion" from gradle.build file or from Project Structure didn't help.

在C：\Users\Gaby \ AppData \ Local \ Android \\\ddk \ build-tools \24.0.3下，我安装了24.0.3构建工具版本。

Under "C:\Users\Gaby\AppData\Local\Android\sdk\build-tools\24.0.3", I installed the 24.0.3 build tool version.

环境变量中的路径变量也表明路径正确

The path variable from environment variables indicates also the path correctly

那一刻，我用android update sdk -u -a安装了所有构建工具，但同样的错误发生了。

At one moment, I had all build-tools installed with "android update sdk -u -a" but again, the same error occured.

有没有人知道这个问题的合适解决方法？

Does anybody know a suitable workaround to this issuse ?

非常感谢