Navigate to standard Activity Task not working

Hello Experts,

I've created a custom embedded component on the Customer screen.

Among other things, this EC contains a list of activities.
These activities are of the standard Activity BO type.
I want to add a button to the list, which when clicked takes you to the Activity Task Thing Inspector.

I based my solution on the standard Activity Task OWL and tried to re-create it.
But when I click the link, I get an error stating that I don't have the correct Work Center assigned.
This is impossible, since the navigation from the standard OWL works perfectly.

Below some screenshots of my current setup:

// icon with click event

// event handler

// outport

// obn navigation

// error message

What is wrong in the configuration?

Thanks in advance.