If 7-Zip cannot open an archive or compressed file and you see Cannot open file as archive error message, here's what you can do.

Microsoft plans to expand the list of file extensions that are banned in Outlook for the web (previously known as Outlook Web Access (OWA)). The list, which previously included 104 file extensions ...

Click Open. If the app that you want to use to open the file type is greyed out, it's because macOS doesn't think there's a valid association between the two.