CSViewer does not allow me to add chart

Hello,
I downloaded CSViewer 2.5 and I am trying to add chart but this part is not activated as shown in the attached screenshot however I can add filters without any problem, what could be the problem? I tried with different CSV files and always the same

The problem is confirmed, we're working on a fix.

@Judy_Trochu The bug has been fixed. Please install the updated version from the website.