My pdf viewer has stopped working

Question

Hello, I have a custom render to view pdf's on iOS:

[assembly: ExportRenderer(typeof(PdfView), typeof(PdfViewRenderer))]
namespace DocPath.Mobile.PdfViewer.Platforms.iOS.CustomRenders
{
   [Xamarin.Forms.Internals.Preserve(AllMembers = true)]
    public class PdfViewRenderer : ViewRenderer<PdfView, WKWebView>
    {
        protected override void OnElementChanged(ElementChangedEventArgs<PdfView> e)
        {
            base.OnElementChanged(e);

            if (Control == null)
            {
                SetNativeControl(new WKWebView(Frame, new WKWebViewConfiguration()));
            }

            if (e.OldElement != null)
            {
                // Cleanup
            }

            if (e.NewElement != null && !string.IsNullOrEmpty(Element.PdfFilePath))
            {
                Control.LoadRequest(new NSUrlRequest(new NSUrl(Element.PdfFilePath, false)));
            }
        }

        protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            base.OnElementPropertyChanged(sender, e);

            if (e.PropertyName == nameof(PdfView.PdfFilePath) && !string.IsNullOrEmpty(customWebView.PdfFilePath))
            {
                ((IElementController)Element).SetValueFromRenderer(PdfView.PdfFilePathProperty, customWebView.PdfFilePath);
                Control.LoadRequest(new NSUrlRequest(new NSUrl(customWebView.PdfFilePath, false)));

            }
        }
    }
}

This worked perfectly until a few days ago, without knowing why it does not load the document and does not show me any error message.

The route to use was from cache, but I have also tried others when it stopped displaying ... but nothing.

Any ideas? Do you know if something has changed in xamarin.ios?

Thanks