You need to run a local webserver to be able to lode the CSV file. If you have Python installed, you can run the following in a terminal from the directory where the example files are:
python -m http.server
The result should look something like:
python -m http.server
Serving HTTP on :: port 8000 (http://[::]:8000/) ...
Then you should be able to load http://localhost:8000 or whatever port the output shows.