I tried it on Windows and got the same error message trying to view the file.
I then renamed the .epub file to a .zip file and tried to unzip it. I got an error message about being unable to create the 'aux' folder. I could not see any reason for this, but I guess it is at the root of the viewing problem. It was not anything obvious like path length as when I was trying to unzip I was using quite a short one as the root for the unzip.
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