Error:Could not initialize class com.android.ide.common.util.ReadWriteProcessLock after updating to A.S. 2.4

After upgrading to Android Studio 2.4 Preview 4 I got this error

Error:Could not initialize class com.android.ide.common.util.ReadWriteProcessLock

After some research, I found out it's a known bug and fortunately, the solution is very simple.

from release notes:

After updating the Android plugin version, you need to stop the Gradle daemon to apply the update (Issue 267099). Otherwise, Gradle sync and builds fail with the following error:

Could not initialize class com.android.ide.common.util.ReadWriteProcessLock, Failed to notify build listener or java.lang.ExceptionInInitializerError.

To stop the daemon, you can either:

1- restart Android Studio,

or

2- enter the following command in the IDE's Terminal window: ./gradlew --stop or for windows gradlew --stop

Gradle restarts the daemon for you the next time you sync or build your project.