Use caching plugins can cause issues with WPCargo plugins and its basic function. You can opt to disable the caching plugin completely or try one of the following solutions:
A. Disable cache per Page
In disable caching per page programatically, you will need your individual page slug. You find this when you do Quick edit. See image below,

Copy and page the following code in the functions.php of your current theme.
//disable caching in the frontend dashboard page
function disable_page_caching($headers) {
if (is_page('dashboard')) {
$headers['Cache-Control'] = 'no-store, no-cache, must-revalidate, max-age=0';
}
return $headers;
}
add_filter('wp_headers', 'disable_page_caching');
//disable caching in Add Parcel Page
function disable_parcel_page_caching($headers) {
if (is_page('add-parcel')) {
$headers['Cache-Control'] = 'no-store, no-cache, must-revalidate, max-age=0';
}
return $headers;
}
add_filter('wp_headers', 'disable_parcel_page_caching');
B. Use of WordPress Plugin Organiser
1. Download and install wordpress plugin organizer. We recommend Plugin Organizer By Jeff Sterup. You may get it here. The plugin is also available in your wordpress repository.

2. Activate the plugin and configure its settings.
3. Go to Plugin Organizer > Settings. Under the Custom Post Type Support selection fields, check all wpcargo post types( wpc_address_book, shipment_container, wpcargo_shipment, wpcargo_invoice ). Click save

4. Go to Post Type Plugin and select WPCargo PostType.

5. Disable all plugin for WPCargo Post Type except for WPCargo Plugins.
NOTE: If your using Woocmmerce for checkout, do not disable Woocommerce and its extensions for the wpcargo post types.