Unable to open word file in InDesign from file explorer window on macOS

Hi, 

I'm trying to add new documents into a new book format but all word files on my desktop are unreadable (greyed out) and can't be imported.

All files are saved to my hard drive and none of the files are sitting open anywhere else on the desktop. I'm new to this so sorry if there is something obvious I'm missing. Any help hugely appreciated. 

Thanks, 

Paul

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