It’s exactly as I thought.
The widget only exists only on the client side.
That means on the server, the array is still empty.
I have now done the following:
I created a reference to the PlayerProxy in the widget and called an event on the PlayerProxy client side.
In this call I enter the name to be added and the reference to the house where it should be added.
In the PlayerProxy, I call a second event on the player proxy which is executed on the server. In this call i pas all references from the first ProxyEvent.
Then I execute the addition with this event.
Works for me
This is the widget form Above but the add nodes are replaced by EventCall
Thats my PlayerProxy BP where i Call a second Event and do the add.

