webView.CoreWebView2.ServerCertificateErrorDetected += WebView_ServerCertificateErrorDetected;

  private void WebView_ServerCertificateErrorDetected(object sender, CoreWebView2ServerCertificateErrorDetectedEventArgs e)
  {
      CoreWebView2Certificate certificate = e.ServerCertificate;
      e.Action = CoreWebView2ServerCertificateErrorAction.AlwaysAllow;
  }

留待后查,同时方便他人