Marketpress - wonked cart and checkout

Good morning!
On the shipping page I'm getting the below errors and the shopping cart widget is showing a list of my pages, rather than the contents of the cart:
Warning: Illegal string offset 'address1' in /home/coachrules/public_html/wp-content/plugins/marketpress/marketpress-includes/template-functions.php on line 530

Warning: Illegal string offset 'address2' in /home/coachrules/public_html/wp-content/plugins/marketpress/marketpress-includes/template-functions.php on line 531

Warning: Illegal string offset 'city' in /home/coachrules/public_html/wp-content/plugins/marketpress/marketpress-includes/template-functions.php on line 532

Warning: Illegal string offset 'state' in /home/coachrules/public_html/wp-content/plugins/marketpress/marketpress-includes/template-functions.php on line 533

Warning: Illegal string offset 'zip' in /home/coachrules/public_html/wp-content/plugins/marketpress/marketpress-includes/template-functions.php on line 534

Warning: Illegal string offset 'country' in /home/coachrules/public_html/wp-content/plugins/marketpress/marketpress-includes/template-functions.php on line 535

Warning: Illegal string offset 'phone' in /home/coachrules/public_html/wp-content/plugins/marketpress/marketpress-includes/template-functions.php on line 538

Thanks,

Javier