Good evening Nicolas and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
I would love to help you with this topic.
What is going on is that there probably needs to be a bit of work done for these 2 plugins to integrate together.
Just to set expectations, the scope of our support is mostly to get our customers started on the right track and to help them in case of issues.
We unfortunately do not provide complete support for customization.
With that in mind, you will probably be very interested in the following article as a starting point: https://theeventscalendar.com/knowledgebase/making-members-calendar/
Let me know if that helps.
Have a great day!
Geoff B.