The web store 'Open In Excel' button does not work for Mac users. Excel indicates that it is downloading some file but then nothing happens. I'm sure expected behavior is that the workbook should open and install the add-in to Excel. Here is a video showing this, on Excel v16.40 (latest version as of this writing):
https://drive.google.com/file/d/1MqlZyqhYe9MfOzJN_sjpFwyPHOn4LuPD/view?usp=sharing
I became aware of this issue because some of our customers have contacted us, asking why the add-in wasn't working. Who knows how many potential customers we have lost because they simply thought the add-in wasn't supported on their system and moved on.
Is this a problem with our add-in code? Is anyone at Microsoft aware of this issue?