AS报错

1. 找不到或无法加载主类

• Android Studio执行kotlin的main方法错误: 找不到或无法加载主类 解决: 在根目录的build.gradle的buildscript中指定kotlin版本: ext.kotlin_version = '1.4.31'

buildscript {
    ext.kotlin_version = '1.4.31'
    repositories {
        google()
        jcenter()
        maven { url 'https://dl.bintray.com/kotlin/kotlin-eap' }
    }
    dependencies {
        classpath "com.android.tools.build:gradle:4.1.1"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}
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代码报错