Error: Execution failed for task ': app: preDexDebug'. finished with non-zero exit value 1

I'm trying to run the Android Studio compiler, but I get this error back.

Error:Execution failed for task ':app:preDexDebug'. >  finished with non-zero      exit value 1

build.grad app:

android {
compileSdkVersion 23
buildToolsVersion "25.0.0"

defaultConfig {
    applicationId "com.estudosmobileoreia.mpeprojeto"
    minSdkVersion 15
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.0.0'
compile 'com.android.support:design:23.0.0'
}