@override
  Widget build(BuildContext context) {
    return CupertinoPageScaffold(
      child: Center(
        child: SizedBox(
          width: 500,
          height: 300,
          child: LottieView.fromFile(
              autoPlay: true,
              onViewCreated: onViewCreated,
              filePath: "asset/animal/ani_hi.json"),
        ),
      ),
    );
  }

java.lang.IllegalStateException: Missing values for keyframe.
E/AndroidRuntime(10726): 	at com.airbnb.lottie.animation.keyframe.ScaleKeyframeAnimation.getValue(ScaleKeyframeAnimation.java:16)
E/AndroidRuntime(10726): 	at com.airbnb.lottie.animation.keyframe.ScaleKeyframeAnimation.getValue(ScaleKeyframeAnimation.java:9)
E/AndroidRuntime(10726): 	at com.airbnb.lottie.animation.keyframe.BaseKeyframeAnimation.getValue(BaseKeyframeAnimation.java:125)
E/AndroidRuntime(10726): 	at com.airbnb.lottie.animation.keyframe.TransformKeyframeAnimation.getMatrix(TransformKeyframeAnimation.java:118)
E/AndroidRuntime(10726): 	at com.airbnb.lottie.model.layer.BaseLayer.draw(BaseLayer.java:199)
E/AndroidRuntime(10726): 	at com.airbnb.lottie.model.layer.CompositionLayer.drawLayer(CompositionLayer.java:100)
E/AndroidRuntime(10726): 	at com.airbnb.lottie.model.layer.BaseLayer.draw(BaseLayer.java:201)
E/AndroidRuntime(10726): 	at com.airbnb.lottie.LottieDrawable.draw(LottieDrawable.java:319)
E/AndroidRuntime(10726): 	at android.widget.ImageView.onDraw(ImageView.java:1360)
E/AndroidRuntime(10726): 	at android.view.View.draw(View.java:21860)
E/AndroidRuntime(10726): 	at android.view.View.buildDrawingCacheImpl(View.java:21129)
E/AndroidRuntime(10726): 	at android.view.View.buildDrawingCache(View.java:20989)
E/AndroidRuntime(10726): 	at android.view.View.draw(View.java:21578)
E/AndroidRuntime(10726): 	at android.view.ViewGroup.drawChild(ViewGroup.java:4551)
E/AndroidRuntime(10726): 	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4326)
E/AndroidRuntime(10726): 	at android.view.View.updateDisplayListIfDirty(View.java:20719)
E/AndroidRuntime(10726): 	at android.view.View.draw(View.java:21586)
E/AndroidRuntime(10726): 	at android.view.ViewGroup.drawChild(ViewGroup.java:4551)
E/AndroidRuntime(10726): 	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4326)
E/AndroidRuntime(10726): 	at android.view.View.updateDisplayListIfDirty(View.java:20719)
E/AndroidRuntime(10726): 	at android.view.View.draw(View.java:21586)
E/AndroidRuntime(10726): 	at android.view.ViewGroup.drawChild(ViewGroup.java:4551)
E/AndroidRuntime(10726): 	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4326)
E/AndroidRuntime(10726): 	at android.view.View.updateDisplayListIfDirty(View.java:20719)
E/AndroidRuntime(10726): 	at android.view.View.draw(View.java:21586)
E/AndroidRuntime(10726): 	at android.view.ViewGroup.drawChild(ViewGroup.java:4551)
E/AndroidRuntime(10726): 	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4326)
E/AndroidRuntime(10726): 	at android.view.View.updateDisplayListIfDirty(View.java:20719)
E/AndroidRuntime(10726): 	at android.view.View.draw(View.java:21586)
E/AndroidRuntime(10726): 	at android.view.ViewGroup.drawChild(ViewGroup.java:4551)
E/AndroidRuntime(10726): 	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4326)
E/AndroidRuntime(10726): 	at android.view.View.draw(View.java:21863)
E/AndroidRuntime(10726): 	at com.android.internal.policy.DecorView.draw(DecorView.java:1083)
E/AndroidRuntime(10726): 	at android.view.View.updateDisplayListIfDirty(View.java:20733)
E/AndroidRuntime(10726): 	at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:725)
E/AndroidRuntime(10726): 	at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:731)
E/AndroidRuntime(10726): 	at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:840)
E/AndroidRuntime(10726): 	at android.view.ViewRootImpl.draw(ViewRootImpl.java:3932)
E/AndroidRuntime(10726): 	at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:3706)
E/AndroidRuntime(10726): 	at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3014)
E/AndroidRuntime(10726): 	at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1873)
E/AndroidRuntime(10726): 	at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8478)
E/AndroidRuntime(10726): 	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:949)
E/AndroidRuntime(10726): 	at android.view.Choreographer.doCallbacks(Choreographer.java:761)
E/AndroidRuntime(10726): 	at android.view.Choreographer.doFrame(Choreographer.java:696)
E/AndroidRuntime(10726): 	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:935)
E/AndroidRuntime(10726): 	at android.os.Handler.handleCallback(Handler.java:873)
E/AndroidRuntime(10726): 	at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(10726): 	at android.os.Looper.loop(Looper.java:214)
E/AndroidRuntime(10726): 	at android.app.ActivityThread.main(ActivityThread.java:6990)
E/AndroidRuntime(10726): 	at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(10726): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
E/AndroidRuntime(10726): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1445)
I/Process (10726): Sending signal. PID: 10726 SIG: 9

Samsung Note 9 / Android 9.
gradle.properties:
org.gradle.jvmargs=-Xmx1536M
android.useAndroidX=true
android.enableJetifier=true

App crashes with the following logs:

E/AndroidRuntime(11357): java.lang.IllegalStateException: Unable to parse composition E/AndroidRuntime(11357): at com.airbnb.lottie.LottieAnimationView$2.onResult(LottieAnimationView.java:68) E/AndroidRuntime(11357): at com.airbnb.lottie.LottieAnimationView$2.onResult(LottieAnimationView.java:66) E/AndroidRuntime(11357): at com.airbnb.lottie.LottieTask.notifyFailureListeners(LottieTask.java:167) E/AndroidRuntime(11357): at com.airbnb.lottie.LottieTask.access$300(LottieTask.java:26) E/AndroidRuntime(11357): at com.airbnb.lottie.LottieTask$1.run(LottieTask.java:142) E/AndroidRuntime(11357): at android.os.Handler.handleCallback(Handler.java:873) E/AndroidRuntime(11357): at android.os.Handler.dispatchMessage(Handler.java:99) E/AndroidRuntime(11357): at android.os.Looper.loop(Looper.java:193) E/AndroidRuntime(11357): at android.app.ActivityThread.main(ActivityThread.java:6669) E/AndroidRuntime(11357): at java.lang.reflect.Method.invoke(Native Method) E/AndroidRuntime(11357): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) E/AndroidRuntime(11357): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) E/AndroidRuntime(11357): Caused by: java.io.FileNotFoundException: flutter_assets/assets/lottie animations/splashscreen.json E/AndroidRuntime(11357): at android.content.res.AssetManager.nativeOpenAsset(Native Method) E/AndroidRuntime(11357): at android.content.res.AssetManager.open(AssetManager.java:744) E/AndroidRuntime(11357): at android.content.res.AssetManager.open(AssetManager.java:721) E/AndroidRuntime(11357): at com.airbnb.lottie.LottieCompositionFactory.fromAssetSync(LottieCompositionFactory.java:100) E/AndroidRuntime(11357): at com.airbnb.lottie.LottieCompositionFactory$1.call(LottieCompositionFactory.java:81) E/AndroidRuntime(11357): at com.airbnb.lottie.LottieCompositionFactory$1.call(LottieCompositionFactory.java:79) E/AndroidRuntime(11357): at java.util.concurrent.FutureTask.run(FutureTask.java:266) E/AndroidRuntime(11357): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) E/AndroidRuntime(11357): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) E/AndroidRuntime(11357): at java.lang.Thread.run(Thread.java:764)

-> Fetching podspec for mark922_flutter_lottie from .symlinks/plugins/mark922_flutter_lottie/ios [!] No podspec found for mark922_flutter_lottie in .symlinks/plugins/mark922_flutter_lottie/ios

Currently experiencing null safety issues with this library

Error: Cannot run with sound null safety, because the following dependencies
don't support null safety:

 - package:flutter_lottie

i tried the flutter_lottie exmaple avilable in the code but got the error,

I/flutter (11371): Creating Method Channel convictiontech/flutter_lottie_0 E/flutter (11371): [ERROR:flutter/shell/common/shell.cc(199)] Dart Error: Unhandled exception: E/flutter (11371): PlatformException(error, java.lang.IllegalStateException: Unable to parse composition E/flutter (11371): at com.airbnb.lottie.LottieAnimationView$2.onResult(LottieAnimationView.java:68) E/flutter (11371): at com.airbnb.lottie.LottieAnimationView$2.onResult(LottieAnimationView.java:66) E/flutter (11371): at com.airbnb.lottie.LottieTask.addFailureListener(LottieTask.java:111) E/flutter (11371): at com.airbnb.lottie.LottieAnimationView.setCompositionTask(LottieAnimationView.java:386) E/flutter (11371): at com.airbnb.lottie.LottieAnimationView.setAnimation(LottieAnimationView.java:338) E/flutter (11371): at com.example.flutter_lottie.LottieView.create(LottieView.java:68) E/flutter (11371): at com.example.flutter_lottie.LottieView.<init>(LottieView.java:38) E/flutter (11371): at com.example.flutter_lottie.LottieViewFactory.create(LottieViewFactory.java:20) E/flutter (11371): at io.flutter.plugin.platform.SingleViewPresentation.onCreate(SingleViewPresentation.java:174) E/flutter (11371): at android.app.Dialog.dispatchOnCreate(Dialog.java:407) E/flutter (11371): at android.app.Dialog.show(Dialog.java:302) E/flutter (11371): at android.app.Presentation.show(Presentation.java:249) E/flutter (11371): at io.flutter.plugin.platform.VirtualDisplayController.<init>(VirtualDisplayController.java:93) E/flutter (11371): at io.flutter.plugin.platform.VirtualDisplayController.create(VirtualDisplayController.java:53) E/flutter (11371): at io.flutter.plugin.platform.PlatformViewsController$1.createPlatformView(PlatformViewsController.java:105) E/flutter (11371): at io.flutter.embedding.engine.systemchannels.PlatformViewsChannel$1.create(PlatformViewsChannel.java:96) E/flutter (11371): at io.flutter.embedding.engine.systemchannels.PlatformViewsChannel$1.onMethodCall(PlatformViewsChannel.java:60) E/flutter (11371): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:231) E/flutter (11371): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:93) E/flutter (11371): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:642) E/flutter (11371): at android.os.MessageQueue.nativePollOnce(Native Method) E/flutter (11371): at android.os.MessageQueue.next(MessageQueue.java:326) E/flutter (11371): at android.os.Looper.loop(Looper.java:160) E/flutter (11371): at android.app.ActivityThread.main(ActivityThread.java:6669) E/flutter (11371): at java.lang.reflect.Method.invoke(Native Method) E/flutter (11371): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) E/flutter (11371): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) E/flutter (11371): Caused by: java.io.FileNotFoundException: flutter_assets/assets/animations/donut.json E/flutter (11371): at android.content.res.AssetManager.nativeOpenAsset(Native Method) E/flutter (11371): at android.content.res.AssetManager.open(AssetManager.java:744) E/flutter (11371): at android.content.res.AssetManager.open(AssetManager.java:721) E/flutter (11371): at com.airbnb.lottie.LottieCompositionFactory.fromAssetSync(LottieCompositionFactory.java:100) E/flutter (11371): at com.airbnb.lottie.LottieCompositionFactory$1.call(LottieCompositionFactory.java:81) E/flutter (11371): at com.airbnb.lottie.LottieCompositionFactory$1.call(LottieCompositionFactory.java:79) E/flutter (11371): at java.util.concurrent.FutureTask.run(FutureTask.java:266) E/flutter (11371): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) E/flutter (11371): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) E/flutter (11371): at java.lang.Thread.run(Thread.java:764) E/flutter (11371): , null)