Ionic android / Android Studio - No installed build tools found. Install the Android build tools version 19.1.0 or higher

Hi, I’m trying to build Android project on Android Studio and I get this error:

No installed build tools found. Install the Android build tools version 19.1.0 or higher.

Note:

1- In the terminal the projet build SUCCESSFUL

2- A simple project (not ionic) build without probleme on Android Studio.

3 - the problem appeared after update gradle :
11


$ ionic info

cli packages: (/usr/local/lib/node_modules)

@ionic/cli-utils  : 1.19.2
ionic (Ionic CLI) : 3.20.0

global packages:

cordova (Cordova CLI) : 8.0.0 

local packages:

@ionic/app-scripts : 3.0.0
Cordova Platforms  : android 6.4.0 browser 5.0.3 ios 4.5.4
Ionic Framework    : ionic-angular 3.9.2

System:

ios-deploy : 1.9.2 
Node       : v8.9.2
npm        : 5.5.1 
OS         : macOS High Sierra
Xcode      : Xcode 9.3 Build version 9E145 

Environment Variables:

ANDROID_HOME : /Users/username/Library/Android/sdk

Misc:

backend : pro

Some help please, I try everything I am desperate
Thanks