React-native-windows unauthorized access error

Question

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.

<uap:Capability Name="picturesLibrary" /> 
<uap:Capability Name="videosLibrary" />
<rescap:Capability Name="broadFileSystemAccess" />

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);

Can anyone knows how to solve this error.