World Server package error: MultiTerm is unable to create the termbase

I was trying to open a World Server package (JA-JP to ZH-TW) but came across the following error message: MultiTerm is unable to create the termbase. I can open a WS package if it is without a termbase. I use Windows 10 (Traditional Chinese version), up-to-date Trados 2019 Freelance SR2 (EN), and up-to-date MultiTerm (EN). My client can open the package without problems, and their OS is in Japanese, and they use Trados 2019 Professional. I have more than 200 packages to open, but so far I could only open those without a termbase. I had this issue before upgrading to SR2 and MultiTerm. Your help is appreciated.