Crashing on Android

[JCKodel]

Device
Brand: LGE
Model: Nexus 5X
Orientation: Portrait
RAM free: 2.95 GB
Disk free: 2.68 GB
Operating System
Version: Android 6.0.1
Orientation: Portrait
Rooted: Yes

Fatal Exception: java.lang.NoSuchMethodError: No virtual method getOrDefault(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object; in class Ljava/util/HashMap; or its super classes (declaration of 'java.util.HashMap' appears in /system/framework/core-libart.jar)
       at net.zonble.flutter_platform_alert.FlutterPlatformAlertPlugin.onMethodCall(FlutterPlatformAlertPlugin.java)
       at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java)
       at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java)
       at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0(DartMessenger.java)
       at io.flutter.embedding.engine.dart.DartMessenger.$r8$lambda$TsixYUB5E6FpKhMtCSQVHKE89gQ(DartMessenger.java)
       at io.flutter.embedding.engine.dart.DartMessenger$$InternalSyntheticLambda$0$ceffc6bae7d364cb48afaf1aaebd60bf9050360d0efb9035ebc54f0851df0a05$0.run(DartMessenger.java)
       at android.os.Handler.handleCallback(Handler.java:739)
       at android.os.Handler.dispatchMessage(Handler.java:95)
       at android.os.Looper.loop(Looper.java:148)
       at android.app.ActivityThread.main(ActivityThread.java:5421)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

[xunreal75]

Problem is open and not fixed ;-(

Is ist possible to replace args.getOrDefault in (FlutterPlatformAlertPlugin.kt:45) by
val windowTitle = args["windowTitle"] ?: ""
val text = args["text"] ?: ""
val alertStyle = args["alertStyle"] ?: "ok"

Line 96 val windowTitle = args["windowTitle"] ?: ""
val text = args["text"] ?: ""
val positiveButtonTitle = args["positiveButtonTitle"] ?: ""
val negativeButtonTitle = args["negativeButtonTitle"] ?: ""
val neutralButtonTitle = args["neutralButtonTitle"] ?: ""
val base64Icon = args["base64Icon"] ?: ""