ALIPAY PAYMENT MODULE 4.1 can't be used in Chinese language state

ALIPAY PAYMENT MODULE  4.1  can't be used in Chinese  language  state

internal string GetMD5(string input)
        {
            var md5 = new MD5CryptoServiceProvider();
            var t = md5.ComputeHash(Encoding.GetEncoding(InputCharset).GetBytes(input));
            var sb = new StringBuilder(32);

            foreach (var b in t)
            {
                sb.AppendFormat("{0:x}", b);
                //  sb.AppendFormat("{0:X}", b);
            }

            return sb.ToString();
        }

Did it work fine for 4.00?

Could you please provide more info? What error are getting?

4.0 is ok.

调试错误，请回到请求来源地，重新发起请求。
错误代码 ILLEGAL_SIGN
说明:如果您不是因为本接口集成调试而看见该错误提醒，请联系本次请求来源网站，本错误属于网站集成接口的错误。
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Actually, the order has been completed. Is it a coding problem?   Can't work in the Chinese language?

Please specify where you get an error?

How long have you tested version 4.00?

4.1，Update the latest version of the browser。  ALIPAY PAYMENT MODULE 4.1   Work is very good。But not all browsers are up to date

I have a question about Nopcommerce Alipay 4.0 Plugin created by Nopcommerce Team.
https://www.nopcommerce.com/p/963/alipay-payment-module-china.aspx
When I checked the source code, it is only for Domestic Alipay Users.

The alipay account I applied for is global.alipay.com
I updated alipayNotifyUrl and Post url here

In AliPayPaymentProcessor.cs
LINE 27-28
private const string ShowUrl = "http://global.alipay.com/";
        private const string Service = "create_forex_trade";

Line 134-139
  var post = new RemotePost
            {
                FormName = "alipaysubmit",
                Url = "https://intlmapi.alipay.com/gateway.do?_input_charset=utf-8",
                Method = "POST"
            };

In PaymentAliPayController.cs
LINE 114
            var alipayNotifyUrl = $"https://intlmapi.alipay.com/gateway.do?service=notify_verify&partner={partner}&notify_id={model.Form["notify_id"]}";

After I rebuilt the plugin and tested it, it shows "ILLEGAL_SIGN"

Can anyone please help?

Thanks