Font/incorrectly-rendered character issue in Studio 2019

Hello,

I encountered a font/incorrectly-rendered character issue in Studio 2019.

Some of the Traditional Chinese characters are shown as squares in my Studio. 

I tried to restore the font setting by following the steps described on this page:

https://answers.microsoft.com/en-us/windows/forum/windows_7-desktop/how-do-i-fix-corrupted-font-files-in-windows-7/7860617d-e4a8-4792-a84b-b83f4bfd81b4

However, it does not work for me.

My OS: Windows 10 Home edition

Studio version: SDL Trados Studio 2019 SR1 - 15.1.2.48878 (Freelance version)

Does anyone know how to solve this problem? 

Thanks,

Nancy