It's because of the temporary maintenance and upgrade of official website institutions these days.

So I can't check. You can wait a few days. If there is no problem with the license number, you can naturally check it.

I used to encounter website maintenance when checking.

I checked it for you today, and made sure you couldn't open the webpage. It is estimated that it will be normal during the day tomorrow.

You can try it yourself tomorrow.

I hope the answer can help you.