[Flutter] i get the error Unhandled Exception: type '_Map<String, dynamic>' is not a subtype...

whenever i try uploading a photo in my form using flutter i get this error Unhandled Exception: type '_Map<String, dynamic>' is not a subtype of type 'String'

am new to flutter so i used an already made project and modified it


const SizedBox(
height: 8,
),
Text(
'Photo',
style: Theme.of(context)
.textTheme
.bodyMedium!
.copyWith(
color: Theme.of(context).hintColor,
letterSpacing: 0.1,
),
),
const SizedBox(
height: 9,
),

photoUrl != null ? Container(
height: 250,
width: double.infinity,
clipBehavior: Clip.antiAliasWithSaveLayer,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(12),
),
child: Image.network(
photoUrl ?? 'https://imgv3.fotor.com/images/blog-cover-image/part-blurry-image.jpg' ,
fit: BoxFit.cover,
)): const Text("Photo not selected yet"),
const SizedBox(
height: 10,
),
ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundColor: AppColors.tabGrey,
),
onPressed: () async{

FilePickerResult? result = await FilePicker.platform.pickFiles(
type: FileType.custom,
allowedExtensions: ['jpg', 'png', 'gif'],
);

String id = uuid.v1();

if (result != null) {
File file = File(result.files.single.path!);
log(file.path);
String fileName = result.files.single.name;

Future result2 = storage.createFile(
bucketId: Credentials.PhotosBucketId,
fileId: id,
file: InputFile.fromPath(
path: file.path,
),
);

result2.then((response) {
log("Pic Uploaded");
photoUrl = 'https://cloud.appwrite.io/v1/storage/buckets/${Credentials.PhotosBucketId}/files/${id}/view?project=${Credentials.ProjectID}';
setState(() {});
Dialogs.showSnackbar(context, "Picture updated successfully! Update to save");
}).catchError((error) {
print(error.response);
Dialogs.showSnackbar(context, "${error}");
});
} else {
// User canceled the picker
Dialogs.showSnackbar(context, "Unable to upload canceled in between");
}
},
child: Text("Upload Image", style: textTheme.titleSmall!.copyWith(color: AppColors.grey),),
),
const SizedBox(
height: 20,
),
TextFieldInput(
controller: phoneController,
title: 'Phone',
hintText: 'Phone number',
onChanged: (val) {},
),

opens != ""
? Column(
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
const SizedBox(
height: 20,
),
Text(
'Last Updated',
style: Theme.of(context)
.textTheme
.bodyMedium!
.copyWith(
color:
Theme.of(context).hintColor,
letterSpacing: 0.1,
),
),
const SizedBox(
height: 12,
),
Text(
"Available: ${opens}",
style: textTheme.bodyMedium!.copyWith(
color: Colors.deepPurple[700]),
),
Text(
"Not Available: ${closes}",
style: textTheme.bodyMedium!
.copyWith(color: AppColors.orange),
),
],
)
: const SizedBox(),
const SizedBox(
height: 25,
),

const SizedBox(
height: 20,
),
ElevatedButton(
onPressed: () async {
List arr = currentAddress.split(", ");
print(arr[arr.length - 1]);
print(arr[arr.length - 2]);
print(arr[arr.length - 3]);
if(ShopModel == null){
print("check your information again");
}

else{
if (myCurrentShop != null) {
myCurrentShop!.name =
storeNameController.text;
myCurrentShop!.lat = lat;
myCurrentShop!.long = long;
myCurrentShop!.country = arr[arr.length - 1];
myCurrentShop!.pincode = arr[arr.length - 2];
myCurrentShop!.district = arr[arr.length - 3];
myCurrentShop!.photo = photoUrl;
myCurrentShop!.address = currentAddress;

myCurrentShop!.phone = phoneController.text;

myCurrentShop!.about = aboutController.text;
myCurrentShop!.opens = opens;
myCurrentShop!.closes = closes;
myCurrentShop!.isOpen = isOpen;
Dialogs.showLoaderDialog(context, "Saving");
await APIs.instance
.updateShopInfo(myCurrentShop!)
.then((value) {
Navigator.pop(context);
});
} else {
ShopModel newShop = ShopModel(
name: storeNameController.text,
lat: lat,
long: long,
country: arr[arr.length - 1],
pincode: arr[arr.length - 2],
district: arr[arr.length - 3],
photohotoUrl,
address: currentAddress,

phone: phoneController.text,

about: aboutController.text,
opens: opens,
closes: closes,
isOpen: isOpen,
);
await APIs.instance
.createShop(currentShop: newShop);}

}
},
child: Text("Update Details"),
),
const SizedBox(
height: 40,
),
]),
),
));
}


thanks in advance

i tried adding attributes to appwrite and givingany permissions but it didnt work and trying to upload a photo more than one time gives this error

Storage bucket with the requested ID could not be found., code: 404, type: storage_bucket_n

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