Null pointer exception with Microsoft 365 online files

[qwertyscar]

Using a template made with Microsoft 365 online excel, I get NullPointerException in com.exigeninsurance.x4j.analytic.xlsx.transform.xlsx.XLSXProcessor.translateSheetName . Using the same template saved with excel desktop application, it works correctly.

Steps to reproduce:

1. Make a template using online excel of Microsoft 365
2. Fill it using the library
3. The error appears
4. Optional, save a copy of the file using excel desktop application, the error doesn't appear

Cannot send examples because I'm not the owner of the file and are sensitive data used by the customer framework