Gradle build error: "Plugin with id 'com.google.ar.sceneform.plugin' not found."
You are missing the classpath in the build.gradle (Project) file:
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.4.1'
classpath 'com.google.ar.sceneform:plugin:1.10.0'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}