Unauthorized access error

I am using react-native-windows for creating windows version of react app and i am trying to upload file and then create base64 data of that file.

I am using `@foqum/react-native-document-picker` to upload file. It's working fine.

And i am using` react-native-fs` to get base64 data of uploaded file.

```
const res = await DocumentPicker.pick({
type: [DocumentPicker.types.allFiles],
});
console.log(
res.uri,
res.type, // mime type
res.name,
res.size
);
var url = res.uri;

RNFS.readFile(url, 'base64')
.then((result) => {
Alert.alert("", "File Uploaded successfully.");

})
.catch((err) => {
Alert.alert("", "File not uploaded.")
});
} catch (err) {
if (DocumentPicker.isCancel(err)) {
// User cancelled the picker, exit any dialogs or menus and move on
} else {
Alert.alert("", "File not uploaded.")
throw err;
}
}
```

After File upload `RNFS.readFile` is called, this function call windows function, see attached image but this function not able to read uploaded file.

`using (var file = new FileStream(filepath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite) )`

Got unauthrozied access error.

I have add all required permision in package.appxmanifest file.

```

```

but still getting Unauthorized access error.

Please see attached image.


I have also tried `StorageFile` but this line also give same error.

`StorageFile folder = await StorageFile.GetFileFromPathAsync(filepath);`

How to solve this error.