Could you please tell me:
Are you referring to Excel workbook?
Please try relinking the workbook. You can also try clearing the Teams cache.
If this issue only occurred recently (it was working fine before), please contact your administrator to report the issue in the M365 admin center or contact phone support for more detailed assistance.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.