Is there a way to upload images to server/folder using flutter web?

Question

Is there a way to upload images to a folder using flutter web. All examples I am seeing are using flutter app or mobile. I am getting all kinds of error from Error: Unsupported operation: _Namespace. to: Error: NoSuchMethodError: 'readAsBytesSync' method not found Receiver: "blob:http://localhost:56058/83544616-abe2-4f5c-ac7b-a15a52e4d2e1" Arguments: []

I have been using this flutter function with image picker and a php backend.

 Future _uploadimages() async {
     var apiUrl = Uri.parse("http://www.redhowler.com/web/db/upload.php");
     String bytes = base64Encode(_image.readAsBytesSync());
     

    Map mappedData = {
      'name': fileName,
      'image': bytes
    };
     
    http.Response response = await http.post(apiUrl, body: mappedData);
    var data = jsonDecode(response.body);
    print(data);
  }