After downloading the most recent 1.2.0 JasperSoft IO Professional package, I have noticed the SAMPLE code incorrectly references scripts which are in directores that have changed or are incorrect.
references <script src="http://localhost:8080/jrio-client/optimized-scripts/client/jrio.js"></script>
which does NOT exist, and results in the error
HTTP ERROR 404
Problem accessing /jrio-client/optimized-scripts/client/jrio.js
the script is actually in;
Consequently the JSFiddle examples do not work out of the box....
It seems there is a version mismatch in the JSFiddle links that were shipped as part of the JRIO Pro 1.2.0 distribution.
We are currently investigating the best way to fix it for everybody trying out 1.2.0.
In the meantime, can you please manually change the URL of the jrio.js script at the top of the HTML panel and use this one:
P.S. fiddles have been fixed online