A Microsoft file hosting and synchronization service.
+1 Signal boost to this hack-y fix
From other comments in this thread it seems like microsoft may be dropping support for Mac versions pre OS-11
Also this comment from Errol in this thread was helpful:
"Hello,
Unfortunately, that fix didn't work for me, but what DID work was going to https://support.microsoft.com/en-us/office/onedrive-release-notes-845dcf18-f921-435e-bf28-4e24b95e5fc0 and selecting the version 23.002.0102.0004 under DEFERRED RING. Didn't need to quit the Standalone Updater on Activity Window.
It may not work for everyone, but I figured I would share in case it does.
Good luck, everyone. Microsoft is so fickle with Mac users..."
Echoing their sentiments - good luck! What a pain in the hole