Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi
This looks like a file system or OS problem.
Start by verifying your file system. It's probably OK, but just in case, do it first:
Next, make a new Mac OS user account in System Preferences > Users and Groups. Switch to the new user account. Then do the following:
Download a copy of the current version of AutoUpdate from this link, install and then run AutoUpdate to bring your installation to current update level, then restart your Mac. If the updater does not open automatically after download, double-click the downloaded .pkg file. Click this link to download the updater. The update is free.