after an update of wp civicrm plugin from 5.16.4 to 5.30.1. (WordPress is also up to date). When I subscribe to an event this fatal error appear : PHP message: PHP Fatal error: Uncaught Error: Class 'CRM_Event_Cart_BAO_Conference' not found in civicrm/CRM/Event/BAO/Event.php:1133
File : "civicrm/CRM/Event/BAO/Event.php:1133"
$sessions = CRM_Event_Cart_BAO_Conference::get_participant_sessions($participantId);
Maybe the problem is due to a wrong setting ? I kept my old civicrm.settings.php as it is after update.
It seems eventcart extension is not installed or activated. I mean this extension : wp-content/plugins/civicrm/civicrm/ext/eventcart/
Do you know how install/enable it?
Thank you for you help. Nicolas