Unable to view excel file

Steps to Replicate

1. Open Excel
2. Create a new Spreadsheet
3. Add "A" in L1C2 cell, "B" in L1C3 cell
4. Add "1" in L2C2 cell, "2" in L2C3 cell
5. Select from L1C2 to L2C3 cell, go to Conditional Format, other conditional format, then # select the first rule format the cells according to their value.
6. Save the Excel file
7. Add as attachment this file to the Confluence page
8. Edit the page, insert Another macro Office Excel
9. Edit the Macro and chose the attached Excel file
10. Save the page

Observed Behavior

User will be seeing the following error:

Error rendering macro 'viewxls' : com.benryan.conversion.ConversionException: com.aspose.cells.CellsException: Not a numeric value in Cell B1

Expected Behavior

User should be able to view the excel file without any issue