How can I fix this Plugin Warning?

Hi, I am having problems with a timeline plugin.

I can no longer view the timeline I created on this page, URL:

I get the following error messages. I tried this on another site with a different theme with all other plugins deactivated and the error remains.

Warning: Invalid argument supplied for foreach() in /home/content/76/10036276/html/alpha/wp-content/plugins/jodetimeline/JodeFrontend.class.php on line 40

The plugin is called ‘Jode Timeline”. The plugin developer is not responding to anyone who asks for support. I really hope someone will be able to help me with this this issue. My client wants to see the timeline that just disappeared after I spent a lot of time working on it and it was looking pretty good.

The link below is where you can download screen shots and a php file where the problem is supposedly originating from.