Spring Boot plugin was not found - spring-boot

Question

I have an issue with gradle project
My build.gradle
buildscript {
ext {
springBootVersion = '2.1.8.RELEASE'
}
repositories {
mavenCentral()
}
dependencies {
classpath(
"org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
}
}
plugins {
id 'org.springframework.boot' version '2.1.8.RELEASE'
}
apply plugin: 'org.springframework.boot'
group = 'com.demo'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'
repositories {
mavenCentral()
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-actuator'
implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
implementation 'org.springframework.boot:spring-boot-starter-security'
implementation 'org.springframework.boot:spring-boot-starter-web'
runtimeOnly 'mysql:mysql-connector-java'
providedRuntime 'org.springframework.boot:spring-boot-starter-tomcat'
testImplementation 'org.springframework.boot:spring-boot-starter-test'
testImplementation 'org.springframework.security:spring-security-test'
}
When I try to run build.gralde, I'm getting error
Plugin [id: 'org.springframework.boot', version: '2.1.8.RELEASE'] was not found in any of the following sources:
Gradle preferences in IDEA
I can't understand, what is the problem, I've generated project with Spring Initializer

Answer 1

I think, I've got the problem.
You just need to turn off "Offline Mode" and it will download it from repo
It's in the right side of the Intellij IDEA

Answer 2

A possible explanation is that by configuring explicitly the buildscript.repositories, you no longer have the default gradlePluginPortal().
Not all plugins are available on Maven Central for example.