Miscellaneous topics that do not fit into specific categories.
Hi! When this happens is usually because Word thinks the file is not writable, Word is not properly activated, or macOS is blocking Word’s access to the folder/drive.
In Finder, select the document > File > Get Info > make sure Locked is unchecked. If the file came from Mail / Messages/web download, try to save the attachment to your Desktop first, then open it from there.
If that's not your case, open Word > Word > About Word and share a picture, please.