Issue Summary

When editing a file with non-English characters leads to errors

This is reproducible on Data Center: (yes) / (no)

Steps to Reproduce

1. Install confluence 8.9.1
2. Save a file with any name in non-English language (eg. ИЗ_Активности.xls)
3. Go to Administration   > General Configuration > Office Connector

1. Enable below options
   
2. Create a Page
3. Upload the mentioned file
4. Add the Office Excel macro and select the same file
5. Save the Page
6. Now click on the Edit Document button

Expected Results

Excel files open

Actual Results

Below error is observed

The below exception is thrown in the atlassian-confluence.log file:

2024-07-04 13:34:21,221 ERROR [http-nio-8090-exec-61 url: /confluence/500page.jsp] [atlassian.confluence.status.SystemErrorInformationLogger] logException Unhandled exception a79fcbd5-208e-4e30-a915-ae195e346fa4: Cannot invoke \"com.atlassian.confluence.pages.Attachment.getFileName()\" because \"this.attachment\" is null
 -- traceId: 247130c483edccaf
java.lang.NullPointerException: Cannot invoke "com.atlassian.confluence.pages.Attachment.getFileName()" because "this.attachment" is null
        at com.benryan.servlet.webdav.AttachmentResource.checkEditPermission(AttachmentResource.java:133)
        at com.benryan.servlet.webdav.ResourceBuilder.buildAttachmentResource(ResourceBuilder.java:123)

Workaround

Rename the file to have English characters and try editing the files