Getting Error:The supplied build action failed with an exception. after adding the gradle plugin step in last video

I believe you have the same problem as here. Check this answer please

https://teamtreehouse.com/community/error-on-refreshing-gradle

I try to write what the problem is about. If you are interested, read below. If not just use solution above.

The problem description

In Intellijdea right now by default Gradle projects are created with Gradle 3+ versions, i.e when you open in your project tree file called gradle/wrapper/gradle-wrapper.properties you will see the following Or almost the same

#Sat Dec 31 07:34:13 CET 2016
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-3.1-all.zip

As you can see Gradle version is 3.1.

And the problem is that this buildscript style that you've provided above:

group 'com.teamtreehouse'

version '1.0-SNAPSHOT'

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath('org.springframework.boot:spring-boot-gradle-plugin:1.2.6.RELEASE')
    }
}

apply plugin: 'java' 
apply plugin: 'spring-boot'

repositories {
    mavenCentral()
}

dependencies {
    compile 'org.springframework.boot:spring-boot-starter-web:1.2.6.RELEASE'
}

It WILL NOT WORK with Gradle 3+.

From here you have two ways:

I. To use new plugins notations. See link above. Example:

plugins {
    id 'java'
    id 'idea'
    id 'org.springframework.boot' version '1.4.3.RELEASE'
}

group 'com.teamtreehouse'
version '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

dependencies {
    compile 'org.springframework.boot:spring-boot-starter-web'
}

II. To change Gradle back to 2.+ version (not recommended).

This can be done by changing gradle/wrapper/gradle-wrapper.properties file to Gradle 2.9 version e.g:

#Sat Dec 31 07:34:13 CET 2016
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-2.9-all.zip

Then it should work.

Additional Info

Just in case you are interested , this buildscript notation is very old and has to be removed, since from Spring boot 1.4.2 I think we can use simple plugins notation.

NOTE: It won't work with earlier version though.

For more info see these two posts:

1. GitHub issue about using plugins notation

https://github.com/spring-projects/spring-boot/issues/1567

1. Tweet about new plugin style problem solved

https://twitter.com/ankinson/status/796062272363888640