https://stackoverflow.com/a/46977035
down vote
accepted
Currently html module using deprecated jetty plugin which is removed in Gradle 4.1 version.
Android Studio 3.0 using Gradle-4.1 and android-gradle-plugin:3.0.0
Gradle 4.1 is not supported yet in LibGDX, there is an open issue for the same.
If you still want to use Android Studio 3.0
Downgrade Gradle to 3.3 from 4.1
Find gradle folder inside your project, Open gradle-wrapper.properties and change distributionUrl for 3.3
distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
Downgrade Android-gradle-plugin to 2.3.3 from 3.0.0
Open root build.gradle file and find artifact and change version
classpath ‘com.android.tools.build:gradle:2.3.3’
Comment/delete google() from repo list