Gradle failed to sync with 'unable to find optional library'

Question

I had to reinstall my system and today I get this error in Android Studio when I try to sync with gradle:

Warning: Unable to find optional library: org.apach         


        

Answer 1

Update your project gradle file to use gradle version 1.3.1.

classpath 'com.android.tools.build:gradle:1.3.1'

Also try adding codehause repo.

repositories {
        mavenCentral()
        maven{
            url 'http://repository.codehaus.org'
        }
    }