2. Select Manage Workbook > Recover Unsaved Workbook . Excel file recovery options 3. From the list of files displayed, open the inaccessible file and save it. Solution 7: Open MS Excel in Safe Mode ...

Every now and then, when I try opening an Excel file, I get a message saying that "Excel cannot open the file 'file.xlsx' because the file format or the file extension is not valid. Verify that the ...

Some users have been getting the "Data source reference is not valid" when trying to create a pivot table from a range in Excel. This particular error is ...

To fix the Excel file format does not match extension error, trying opening the spreadsheet with the Open and Repair option or changing its file extension.

To fix the Microsoft Excel file not loaded completely error, try opening the spreadsheet with other software, exporting it to Access, or splitting a CSV.

The following reasons may play a part in triggering this FileType error: The file format could indeed be the cause for FileType selected not being supported by Teams, Excel, etc.