[firebase_storage] Can't upload data!

[AliKales]

My app was already done and it was working but since 3 days i'm getting this error below;

W/NetworkRequest( 3906): at com.google.firebase.storage.StorageTask.lambda$getRunnable$7$StorageTask(StorageTask.java:1072)
W/NetworkRequest( 3906): at com.google.firebase.storage.-$$Lambda$StorageTask$q9YBoR_A8LB-JxTCx8JRQvabaZs.run(Unknown Source:2)
W/NetworkRequest( 3906): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
W/NetworkRequest( 3906): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
W/NetworkRequest( 3906): at java.lang.Thread.run(Thread.java:764)
W/ExponenentialBackoff( 3906): network unavailable, sleeping.

Flutter Doctor

[√] Flutter (Channel master, 2.6.0-12.0.pre.790, on Microsoft Windows [Version 10.0.19042.1348], locale tr-TR)
[√] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
[√] Chrome - develop for the web
[√] Android Studio (version 4.2)
[√] IntelliJ IDEA Community Edition (version 2020.1)
[√] VS Code (version 1.62.3)
[√] Connected device (3 available)
• No issues found!

My Code

`File file = File(widget.path);

      Stream<firebase_storage.TaskSnapshot> stream = firebase_storage
          .FirebaseStorage.instance
          .ref(song.pathToSong)
          .putFile(file)
          .snapshotEvents;

      stream.listen((event) {
        setState(() {
          progressUploadAudio =
              (((100.0 * event.bytesTransferred) / event.totalBytes)
                      .roundToDouble() /
                  100);
        });
        if (event.state == firebase_storage.TaskState.success) {
          FirebaseFirestoreService().setSongDatas(song).then((value) {
            song.songUrl = value;
            FirebaseFirestoreService().putOwnSong(song);
            setState(() {
              isShared = true;
              isSharing = false;
            });
          });
        }
      });`