A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
1
Open Excel.
At the top right of Excel, log out of Office.
Restart (not shut down) your PC, then log back into Office, is your licence/subscription then recognized correctly.
2
If not, log into your Microsoft account on this link, is your Office licence listed correctly there, or if that is a subscription, check the expiry date listed on your subscription, is that listed correctly.