Huawei Mobile Services (HMS) exception: Token is invalid or expired when using ML kit Real-Time Translation on cloud?

Question

exception: Token is invalid or expired.

What is this error? I have already set the api key. And what does this token represent?

val setting: MLRemoteTranslateSetting =
                MLRemoteTranslateSetting.Factory()
                    .setSourceLangCode("en")
                    .setTargetLangCode("hu")
                    .create()
            val mlRemoteTranslator: MLRemoteTranslator =
                MLTranslatorFactory.getInstance().getRemoteTranslator(setting)

            try {
                val result = MLTranslateLanguage.syncGetCloudAllLanguages()
            } catch (e: MLException) {
                Log.e("ML exception", e.message.toString())
            }

            var output = ""
            try {
                output = mlRemoteTranslator.syncTranslate("SOURCE")
            } catch (e: MLException) {
                Log.e("ML exception", e.message.toString())
            }
            mlRemoteTranslator.stop()

I get this error here: val result = MLTranslateLanguage.syncGetCloudAllLanguages() and here: output = mlRemoteTranslator.syncTranslate("SOURCE")

I set the api key like this: MLApplication.getInstance().apiKey = Utils.apiKey

object Utils {

private const val TAG = "Utils"

@JvmStatic
val apiKey: String?
    get() {
        // get apiKey from AppGallery Connect
        val apiKey = "myApiKey"

        // need encodeURI the apiKey
        return try {
            URLEncoder.encode(apiKey, "utf-8")
        } catch (e: UnsupportedEncodingException) {
            Log.e(TAG, "encode apikey error")
            null
        }
    }}