[Defender] Defender Fatal Error

Hello !
I'm experiencing a weird error on one of my site, that seems to happen any time a woocommerce order is made, or when a woocommerce order status changes.

I've tried to deactivate the defender plugin, and it solved the problem.
But I can't stay without a Defensive plugin.

Can you help me ?

This is what the error log says :
Uncaught Error: Call to a member function to_array() on null in /home/calvinjfress/sites/maison/wp-content/plugins/wp-defender/app/module/audit/component/comment-audit.php:147
Type: PHP Fatal error
File: /home/calvinjfress/sites/maison/wp-content/plugins/wp-defender/app/module/audit/component/comment-audit.php