Can't view/edit orders

After moving to new servers when i try to view/edit orders i get this error:
fatal error: Call to a member function get_items() on boolean in /home/jbracing/public_html/wp-content/plugins/woocommerce/includes/admin/meta-boxes/views/html-order-items.php on line 13

the code on that line:
`$line_items = $order->get_items( apply_filters(‘woocommerce_admin_order_item_types’, ‘line_item’ ) );

any idea how to fix this?

https://wordpress.org/plugins/woocommerce/