Never mind - moving the data file to ~/Desktop and dragging & dropping that seemed to work - doing the same thing with the file nested several directories deep did not work
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I get the same error - uploading via the 'Add data' UI from a Mac & choosing a local file via the UI or dragging/dropping into the 'drop your data file here'.
As far as I can tell, I don't have control over the path that is sent in the POST; tried 'edit & resend' to add the full local path, but that didn't work either (bad request)
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