Thx for replying. Unfortunately, I have already reinstall Zoom-window several times, resulting in no difference. The current version is the latest 5.8.4 (1736). Also, I cannot open the setting icon (the gear icon at the top-right corner) too.
Lets go through one other step before we dig deeper into this. From what I'm seeing this may just be a Mac permission that is missing so we need to maybe just get the client uninstalled in total before reinstalling. Can you please go ahead and Uninstall your client according to this article, then restart your Mac and then reinstall the client. How to uninstall Zoom – Zoom Support