Tabs Showing Error

Hello, hope you can help. We are getting the following errors through from the tabs plugin, do you know what would be causing this issue?
Warning: unserialize() expects parameter 1 to be string, array given in /home/sites/pata.org.uk/public_html/wp-content/plugins/tabs-responsive/template/content.php on line 14
Warning: unserialize() expects parameter 1 to be string, array given in /home/sites/pata.org.uk/public_html/wp-content/plugins/tabs-responsive/ink/admin/add-tabs.php on line 56

Warning: Invalid argument supplied for foreach() in /home/sites/pata.org.uk/public_html/wp-content/plugins/tabs-responsive/ink/admin/add-tabs.php on line 62

Thanks