It's possible this issue belongs in the CSV-Extension repository, but I'll go ahead and post it here.
The CSV example model uses csv:to-file, which tries to write to a path in the same directory as the current model. On Windows, this directory is not writable by default (unless you run NetLogo as an administrator), so the user gets an error (although the error is clear enough to describe the problem).
I'm honestly not sure what the appropriate fix is here. The model works correctly on Mac and will work on Linux as long as the user has the appropriate permissions (most Linux users will be able to troubleshoot this one on their own).