DatePicker "SigningDate" fails on selecting date

Hi friends,

I have an issue with signing data from the web interface. DatePicker fails on open and I can`t select date.
Javascript error "TypeError: Cannot read properties of null (reading 'length')";

I using VS2019, C#, WebView2 component

string tempDir2 = Path.GetTempPath();
CoreWebView2EnvironmentOptions options = null;
CoreWebView2Environment webView2Environment = await          CoreWebView2Environment.CreateAsync(null, tempDir2, options);
await webBrowser1.EnsureCoreWebView2Async(webView2Environment);
webBrowser1.Source = new Uri(url);