FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'kotlin'.
> Could not resolve all files for configuration ':classpath'.
   > Could not find org.jetbrains.kotlin:kotlin-gradle-plugin:1.1.50-eap-4.
     Searched in the following locations:
         http://maven.aliyun.com/nexus/content/groups/public/org/jetbrains/kotlin/kotlin-gradle-plugin/1.1.50-eap-4/kotlin-gradle-plugin-1.1.50-eap-4.pom
         http://maven.aliyun.com/nexus/content/groups/public/org/jetbrains/kotlin/kotlin-gradle-plugin/1.1.50-eap-4/kotlin-gradle-plugin-1.1.50-eap-4.jar
         https://repo1.maven.org/maven2/org/jetbrains/kotlin/kotlin-gradle-plugin/1.1.50-eap-4/kotlin-gradle-plugin-1.1.50-eap-4.pom
         https://repo1.maven.org/maven2/org/jetbrains/kotlin/kotlin-gradle-plugin/1.1.50-eap-4/kotlin-gradle-plugin-1.1.50-eap-4.jar
     Required by:
         project :

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

* Get more help at https://help.gradle.org

CONFIGURE FAILED in 8s
Could not find org.jetbrains.kotlin:kotlin-gradle-plugin:1.1.50-eap-4.
Searched in the following locations:
    http://maven.aliyun.com/nexus/content/groups/public/org/jetbrains/kotlin/kotlin-gradle-plugin/1.1.50-eap-4/kotlin-gradle-plugin-1.1.50-eap-4.pom
    http://maven.aliyun.com/nexus/content/groups/public/org/jetbrains/kotlin/kotlin-gradle-plugin/1.1.50-eap-4/kotlin-gradle-plugin-1.1.50-eap-4.jar
    https://repo1.maven.org/maven2/org/jetbrains/kotlin/kotlin-gradle-plugin/1.1.50-eap-4/kotlin-gradle-plugin-1.1.50-eap-4.pom
    https://repo1.maven.org/maven2/org/jetbrains/kotlin/kotlin-gradle-plugin/1.1.50-eap-4/kotlin-gradle-plugin-1.1.50-eap-4.jar
Required by:
    project :