I understand the issue you're having and will try my best to assist you in this matter.
When trying to add the product to the cart, I received an error stating, "This product cannot be purchased." Often, this error arises when the price, type, or other essential details are not associated with the product.
Will you please open that Particular event in Dutch language and ensure that all the details are added properly to that event? Specifically, check the Ticket configuration and make sure that all the details are correctly added, as per the English version of the event.
Please let me know the update. I will be happy to help if you need further assistance in this matter.
