FBDI Templates - Unable to Open (suggested corruption)

Summary:

2 FBDI Templates - ResourceBreakdownStructureTemplate.xlsm and ProjectRateScheduleImportTemplate.xlsm are not opening in Excel when downloaded from File-Based Data Import (FBDI) for PPM webpage.

Content (required):

When the above Templates are downloaded from the Oracle site, an error is received in Excel suggesting the file is either corrupt or the file type does not match the extension.

We have previously used these files with no issue.

I am exploring whether this is a source file problem or an issue with our infrastructure blocking .xlsm files.

Interestingly, it's only these 2 files that are failing - all other FBDI templates function correctly.