To Do app and web frozen on Mac

[Romit Mehta]

On my work Mac running Catalina, the To Do app fails to launch (bouncing icon in dock) and the web app freezes my browser (Edge Chromium, Safari). The only view that works is the sidebar in Outlook web app. I have uninstalled and reinstalled from the App Store and it doesn’t make a difference. Any other ideas to make the app work?

[#2]

I am seeing somewhat similar behavior with Microsoft To Do for Mac. (More platform details below.)
The app starts but becomes complete unresponsive, apart from an occasional menu outline popping up in response to menu activation.
Reinstall has no effect.
The steps suggested in the following article had no effect: https://techcommunity.microsoft.com/t5/microsoft-to-do/microsoft-to-do-not-working-on-mac-os/m-p/122...
I will try the Web client now.
Microsoft To Do for Mac OS 2.80 (posted 1w ago) on macOS 12.6, 2020 Macbook Air.