Hi @DVL accounts.06
Via the translation tool, I find your workbook is opened as read-only, so you cannot save changes on this file.
Could you please check the Office product name and Office version number?
- To get this information, you may go to
File > Account > Product Information
. - If you are using Microsoft 365 Apps, please close Autosave for a check.
Do other users open the workbook properly? Besides, do all users who open this file use the same version of Office?
How did you access and open this file?
- Do you sync SharePoint library to local and then open the file from Windows File Explorer?
- Please try to open the file from SharePoint directly, you may also open it via Excel for web.
- You may try to open the file within Excel app via clicking File > Open, locate to your SharePoint site, browser the file to open.
Then I suggest you add your SharePoint URL as trusted locations in Office.
Please add https://{your-domain-name}.sharepoint.com
into the Trusted Sites zone.
Here is an article, please check whether it is helpful: Why did my file open read-only?
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