Internal Server Error with Woocommerce- E_ERROR After updating to latest version

Hello,
Since the last WordPress update, Mailpoet has caused many problems on our site and this has cost us a lot on the store (multiple orders to be reimbursed). The problem comes from Mailpoet. Here are the error codes sent by WordPress:

Une erreur de type E_ERROR a été causée dans la ligne 116 du fichier /home/###/www/wp-content/plugins/mailpoet/lib/AutomaticEmails/WooCommerce/Events/PurchasedInCategory.php.
Message d’erreur : Uncaught Error: Call to a member function get_category_ids() on boolean in /home//###/www/wp-content/plugins/mailpoet/lib/AutomaticEmails/WooCommerce/Events/PurchasedInCategory.php:116
Stack trace:
#0 /home//###/www/wp-includes/class-wp-hook.php(290): MailPoet\AutomaticEmails\WooCommerce\Events\PurchasedInCategory->scheduleEmail(2743)
#1 /home//###/www/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL, Array)
#2 /home//###/www/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#3 /home//###/www/wp-content/plugins/woocommerce/includes/class-wc-order.php(363): do_action(‘woocommerce_ord…’, 2743, Object(WC_Order))
#4 /home//###/www/wp-content/plugins/woocommerce/includes/class-wc-order.php(221): WC_Order->status_transition()
#5 /home//###/www/wp-content/plugins/woocommerce/includes/admin/meta-boxes/class-wc-meta-box-order-data.php(620): WC_Order->save()
#6 /home//###/www/wp-includes/class-wp-hook.php(288): WC_Meta_Box_Order_Data::save(2743, Obje

Can you fix this problem as soon as possible?
Thank you in advance.
Have a good day