Hi @Robert Sawyer,
The problem might caused by view parameters. If a view had filter parameters, it'll try to use those in the spreadsheet as well. However csv won't be able to access any HTML/ASP.NET controls (which it won't embed in the spreadsheet), and it also won't be able to read from the querystring because there is none to read from. I suggest you use the "All Items" view instead of any other view.
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