richardstowe on "[Plugin: TablePress] Attention: The internal data of table “X” is corrupted!"

I am using the latest version of TablePress.
New tables can be created fine. Tables are perfectly viewed using shortcodes.
But problem is when I try to add images in my table and refresh my page, it comes with error like "Attention: The inteal data of table “X” is corrupted!"

How can I fix this? Here's the link where I have used my table:
http://mattressrocks.com/comparison-chart/

https://wordpress.org/plugins/tablepress/