Error Downloading Updates

[sicksand]

Hi,

I am getting error on downloading updates, An error occurred when downloading updates.. I could only get this on Logcat

2019-01-07 11:33:14.060 17587-18098/my.sustento.zankoattendancesystemzas V/ThinDownloadManager: Download initiated for 1
2019-01-07 11:33:14.346 17587-18098/my.sustento.zankoattendancesystemzas V/ThinDownloadManager: Response code obtained for downloaded Id 1 : httpResponse Code 200
2019-01-07 11:33:14.346 17587-18098/my.sustento.zankoattendancesystemzas D/ThinDownloadManager: cleanupDestination() deleting /storage/emulated/0/Download/update-2019-01-07.apk

I am using version 1.0.10

My code as follows

private void update(){
        // Using https://github.com/atzcx/AppVerUpdater as json updater for app
        //
        appVerUpdater = new AppVerUpdater()
                .setUpdateJSONUrl("https://zanko-attendance-system.firebaseapp.com/assets/update.json")
                .setShowNotUpdated(true)
                .setViewNotes(true)
                .setCallback(new Callback() {
                    @Override
                    public void onFailure(UpdateErrors error) {

                        if (error == UpdateErrors.NETWORK_NOT_AVAILABLE) {
                            Toast.makeText(ExitActivity.this, "No internet connection.", Toast.LENGTH_LONG).show();
                        }
                        else if (error == UpdateErrors.ERROR_CHECKING_UPDATES) {
                            Toast.makeText(ExitActivity.this, "An error occurred while checking for updates.", Toast.LENGTH_LONG).show();
                        }
                        else if (error == UpdateErrors.ERROR_DOWNLOADING_UPDATES) {
                            Toast.makeText(ExitActivity.this, "An error occurred when downloading updates.", Toast.LENGTH_LONG).show();
                        }
                        else if (error == UpdateErrors.JSON_FILE_IS_MISSING) {
                            Toast.makeText(ExitActivity.this, "Json file is missing.", Toast.LENGTH_LONG).show();
                        }
                        else if (error == UpdateErrors.FILE_JSON_NO_DATA) {
                            Toast.makeText(ExitActivity.this, "The file containing information about the updates are empty.", Toast.LENGTH_LONG).show();
                        }

                    }

                    @Override
                    public void onDownloadSuccess() {
                        // for example, record/reset license
                    }

                    @Override
                    public void onUpdateChecked(boolean downloading) {
                        // Happens after an update check, immediately after if update check was successful and there
                        // were no dialogs, or, when an update dialog is presented and user explicitly dismissed the dialog.
                        // "downloading" is true if user accepted the update
                        // Typically used for resetting next update check time
                    }
                })
                .setAlertDialogCancelable(true)
                .build(this);

    }
    @Override
    protected void onResume() {
        super.onResume();
        appVerUpdater.onResume(this);
    }

    @Override
    protected void onStop() {
        super.onStop();
        appVerUpdater.onStop(this);
    }

My json

{
  "newVersion": "0.4.6",
  "apkUrl":
"https://zanko-attendance-system.firebaseapp.com/assets/ZAS046.apk",
  "versionNotes": [
    "- Bug fixes",
    "- Changes GPS code"
  ]
}```