Font/incorrectly-rendered character issue in Studio 2019


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:

However, it does not work for me.

My OS: Windows 10 Home edition

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

Does anyone know how to solve this problem?