Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello
What does the error say exactly?
IF it asks you to repair, then close all of the apps, then go to Settings > Apps > Installed Apps, locate Microsoft 365 and then click on the three dots > modify, run an online repair.
If that doesn't address the issue, uninstall it. Then restart the computer.
Reinstall it this way: Please go to https://www.office.com
Sign into the Microsoft account you used for the subscription. Click on the 9-dot icon on the upper left > More apps.
Then on the upper right, click on "Install apps". This will now download the installer file. Once downloaded, click on the file to install. It will install the Desktop version of the apps for you then.