Didn't find class "kotlin.reflect.KProperty"报错

解决方案：请配置kotlin开发环境 参考Kotlin官网

步骤1: 在根目录下的buid.gradle

buildscript {
    ext {
        kotlinVersion = '1.3.40'
    }
    dependencies {
        ......
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
        
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

步骤2: 在module目录下的buid.gradle

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'

dependencies {
    ......
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlinVersion"
}