Garbled characters in trados 2019 preview

I have a md file to translate, I'm using Trados2019sr2, so I can process md files, the md file is in Chinese, and when I open the editor and click the preview button, all the chinese characters are garbled;

BTW: It shows the right chinese characters in File - Print & View - View In - Web Browser as Source & Web Browser as Target

Heres some screenshots:

grabled characters