class MainActivity : ComponentActivity() {

    // Теперь nullable, без lateinit
    private var jsSandbox: JavaScriptSandbox? = null
    private var jsIsolate: JavaScriptIsolate? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        if (!JavaScriptSandbox.isSupported()) {
            Log.e("JS", "JavaScriptSandbox не поддерживается")
            return
        }

        lifecycleScope.launch {
            // Создаём и сохраняем в nullable-поле
            jsSandbox = JavaScriptSandbox
                .createConnectedInstanceAsync(applicationContext)
                .await()
            jsIsolate = jsSandbox?.createIsolate()

            // При выполнении гарантируем, что jsIsolate != null
            val result: String = jsIsolate
                ?.evaluateJavaScriptAsync(JS_SCRIPT_SCRING)
                ?.await()
                ?: "Ошибка: isolate не инициализирован"

            Log.d("JS", "Результат выполнения: $result")
        }
    }

    override fun onDestroy() {
        super.onDestroy()
        // Закрываем только если не null
        jsIsolate?.close()
        jsSandbox?.close()
    }
}

Some problems were found with the configuration of task ':module:kspDebugKotlinAndroid' (type 'KspAATask').
  - Gradle detected a problem with the following location: './module'.
    
    Reason: Task ':module:kspDebugKotlinAndroid' uses this output of task ':module:javaPreCompileDebug' without declaring an explicit or implicit dependency. This can lead to incorrect results being produced, depending on what order the tasks are executed.
    
    Possible solutions:
      1. Declare task ':module:javaPreCompileDebug' as an input of ':module:kspDebugKotlinAndroid'.
      2. Declare an explicit dependency on ':module:javaPreCompileDebug' from ':module:kspDebugKotlinAndroid' using Task#dependsOn.
      3. Declare an explicit dependency on ':core:user-session:javaPreCompileDebug' from ':module:kspDebugKotlinAndroid' using Task#mustRunAfter.
    
    For more information, please refer to https://docs.gradle.org/8.14.2/userguide/validation_problems.html#implicit_dependency in the Gradle documentation.

// build.gradle.kts модуля где подключен ksp
afterEvaluate {
    android.libraryVariants.forEach { variant ->
        val variantCapitalized = variant.name.capitalized()
        tasks.named("ksp${variantCapitalized}KotlinAndroid") {
            dependsOn(
                "${variant.name}AssetsCopyForAGP",
                "process${variantCapitalized}Manifest",
                "write${variantCapitalized}AarMetadata",
                "javaPreCompile${variantCapitalized}",
                "merge${variantCapitalized}Assets",
                "merge${variantCapitalized}JniLibFolders",
                "merge${variantCapitalized}NativeLibs",
                "copy${variantCapitalized}JniLibsProjectOnly",
                "generate${variantCapitalized}EmptyResourceFiles",
                "copy${variantCapitalized}JniLibsProjectAndLocalJars",
                "prepare${variantCapitalized}ArtProfile",
                "write${variantCapitalized}LintModelMetadata",
                "extractProguardFiles",
                "prepareLintJarForPublish",
            )
        }
    }
}