A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
You are not alone; there have been some reports of the Excel Stock data Import not working.
https://learn.microsoft.com/en-us/answers/questions/5873377/excels-data-updating-isnt-working
I am afraid I am not aware of any fix right now, please click Help > Send Feedback > Report a Problem to report the issue. In the past, the problem typically resolves in the 24 hours.