I update my android studio to 3.2.1
now when I start a new project everything is OK.
but when I open the last project I have an error :
Could not find builder.jar (com.android.tools.build:builder:3.0.1). Searched in the following locations: https://dl.google.com/dl/android/maven2/com/android/tools/build/builder/3.0.1/builder-3.0.1.jar
build.gradle: classpath 'com.android.tools.build:gradle:3.0.1'
My gradle version 4.1