Error using file importer in SwiftUI app in combination with Firebase Storage

Trying to use file importer in a swift app to upload documents into firebase Storage and getting error when running on live device but works perfectly fine on emulator. error:

BackgroundSession <***...> Failed to issue sandbox extension for file file:///private/var/mobile/Library/Mobile%20Documents/comappleCloudDocs/Sample.pdf, errno = [1: Operation not permitted]

UNKNOWN ERROR Error Domain=FIRStorageErrorDomain Code=-13000 "An unknown error occurred, please check the server response." UserInfo={object=Repository/Sample.pdf, ResponseBody=Can not finalize upload. Current size is 0. Expected final size is 2665098., bucket=bucket, data={length = 77, bytes = 0x43616e20 6e6f7420 66696e61 6c697a65 ... 32363635 3039382e }, data_content_type=text/plain; charset=utf-8, NSLocalizedDescription=An unknown error occurred, please check the server response., ResponseErrorDomain=com.google.HTTPStatus, ResponseErrorCode=400}

I tried separating all the logic from selectedFile.startAccessingSecurityScopedResource() all the way through the end into a function of its own using @MainActor based on another post I found around here and issue persisted..

Below is the implementation:

.fileImporter(
        isPresented: $fileImporterIsPresented,
        allowedContentTypes: [.pdf],
        allowsMultipleSelection: false
    ) {
        result in
        
        switch result
        {
        case .success(let url):
            print(url)
            
                guard let selectedFile:URL = url.first else { return }
                
                guard selectedFile.startAccessingSecurityScopedResource() else
                {
                    return
                }

    
                
                let firebaseRepository = Storage.storage().reference().child("Repository/Sample.pdf")
                
                let uploadTask = firebaseRepository.putFile(from: selectedFile)
                
                uploadTask.observe(.progress)
                {
                    snapshot in
                    // Upload reported progress
                    percentComplete = 100.0 * Double(snapshot.progress!.completedUnitCount)
                    / Double(snapshot.progress!.totalUnitCount)
                }
                
                uploadTask.observe(.success)
                {
                    snapshot in
                    
                    selectedFile.stopAccessingSecurityScopedResource()
                    uploadTask.removeAllObservers()
                    
                    print("SUCCESS")
                    // Upload completed successfully
                }
                
                uploadTask.observe(.failure)
                {
                    snapshot in
                    
                    if let error = snapshot.error as? NSError
                    {
                        switch (StorageErrorCode(rawValue: error.code)!)
                        {
                        case .objectNotFound:
                            print("NOT FOUND")
                            // File doesn't exist
                            break
                        case .unauthorized:
                            print("UNAUTHORIZED")
                            // User doesn't have permission to access file
                            break
                        case .cancelled:
                            print("CANCELLED")
                            // User canceled the upload
                            break
                            
                            /* ... */
                            
                        case .unknown:
                            print("UNKNOWN ERROR \(error.description)")
                            print("UNKNOWN ERROR \(error.localizedDescription)")
                            print("UNKNOWN ERROR \(error.underlyingErrors)")
                            // Unknown error occurred, inspect the server response
                            break
                        default:
                            print("UNSPECIFIED ERROR")
                            // A separate error occurred. This is a good place to retry the upload.
                            break
                        }
                    }
                }
        case .failure(let error):
            print(error)
        }
    }