Hello Dennis,
I’m sorry you are having this problem. Let me help you with that.
To clarify, after you hit save, there is no Ticket created on the Event page, or in WooCommerce or both?
Thanks for the screenshot. No, the product does not have to be selected in order to get tickets created in WooCommerce. Only Event / Evenement has to be selected. So that setting is good.
Could you possibly do a testing for conflicts based on our guide:
Testing Conflicts With Themes and Other Plugins
This can help us narrow down the cause of this.
Thanks and cheers,
Andras