Critical Error with Connect Paid Memberships Pro to Discord

Hello,

I have a new problem with Paid MemberShips Pro. I would like to use Discord with my website. But, when I dowload this plugin : ”
Connect Paid Memberships Pro to Discord”. I have a critical error with WordPress. I have to delete the plugin.

I tried to start my website with just Paid MemberShip Pro and “Connect Paid Memberships Pro to Discord” without none plugin. But I have the same problem.

This feature is essential for my business.

Do you need more information ?

Thank for your help.