Hi,
When PennController cannot read a CSV file, it would normally throw an error in the Error tab of the Debug window. What you are describing is different, and I don’t think I’m familiar with this error. Where do you see it, is it in the web console?
In any case, feel free to share the demonstration link of your experiment (“Share” option in the right menu on your project’s page), whose copies will contain a copy of that CSV file
Jeremy