WKWebView: Error when loading file from memory - SwiftUI

I am trying to load a file from memory and preview it in a WebView in SwiftUI. I already made the same procedure in Swift and it's working, but it's not working in SwiftUI. Files and successfully save to memory and retrieved, but I am getting this error:

WebPageProxy::didFailProvisionalLoadForFrame: frameID=3, domain=NSPOSIXErrorDomain, code=1, isMainFrame=1

This function will return the WebView

private func createURL() -> AnyView{
    DocumentManager.shared.save(text: "Hey dear", toDirectory: DocumentManager.shared.documentDirectory(), withFileName: "test345.docx")
    let fileURL = DocumentManager.shared.read(fromDocumentsWithFileName: "test345.docx")
    return AnyView(Webview(url: URL(fileURLWithPath: fileURL)))
}

This is my UIViewRepresentable:

struct Webview: UIViewRepresentable {
    let url: URL
    let navigationHelper = WebViewHelper()

    func makeUIView(context: UIViewRepresentableContext<Webview>) -> WKWebView {
        let webview = WKWebView()
        webview.navigationDelegate = navigationHelper
    
        let request = NSURLRequest(url: url as URL) as URLRequest
        webview.load(request)
    
        return webview
    }

    func updateUIView(_ webview: WKWebView, context: UIViewRepresentableContext<Webview>) {
        let request = URLRequest(url: self.url, cachePolicy: .returnCacheDataElseLoad)
        webview.load(request)
    }
}

And this is my WebView helper class:

class WebViewHelper: NSObject, WKNavigationDelegate {
    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        print("webview didFinishNavigation")
    }

    func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
        print("didStartProvisionalNavigation")
    }

    func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) {
        print("webviewDidCommit")
    }

    func webView(_ webView: WKWebView, didReceive challenge: URLAuthenticationChallenge, completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
        print("didReceiveAuthenticationChallenge")
        completionHandler(.performDefaultHandling, nil)
    }
}