I guess it has small issue with new gradle. I solve the problem with this new build.gradle file if any one interested in.

`apply plugin: 'com.android.application'
apply plugin: 'io.fabric'

android {
compileSdkVersion 25
buildToolsVersion '27.0.3'

defaultConfig {
    applicationId "fr.panda.sudoku"
    minSdkVersion 16
    targetSdkVersion 25
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

}

dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
//noinspection GradleCompatible
implementation 'com.android.support:appcompat-v7:25.+'
implementation 'com.google.android:flexbox:1.0.0'
implementation 'com.android.support:recyclerview-v7:25.4.0'
// json parsing
implementation 'com.fasterxml.jackson.core:jackson-core:2.6.3'
implementation 'com.fasterxml.jackson.core:jackson-databind:2.6.3'
implementation 'com.fasterxml.jackson.core:jackson-annotations:2.6.0'
// dialog : https://github.com/00ec454/pop
implementation 'com.vistrav:pop:2.3'
// list
implementation 'com.android.support:design:23.+'
implementation 'com.android.support:recyclerview-v7:23.+'
// image
implementation 'com.github.bumptech.glide:glide:3.7.0'
// crash
implementation('com.crashlytics.sdk.android:crashlytics:2.9.2@aar') {
transitive = true;
}
implementation 'org.webjars.npm:flexbox-grid:1.0.0'
}
`