Don't use Thunder or other download tools to download, just use the browser to download.
It is recommended to download with Google browser, because I have been downloading with Google browser, and it is normal every time.
If you download with IE or 360 browser, sometimes you will make mistakes.
If you don't want to change your browser, you can also ask questions at Baidu, attach a document link and email address, and ask other netizens to download it for you.
As long as you set up the reward points properly, someone will help you.