Hi Vincent, Looks like you're looking in the wrong place. Basically any place there is a method called mx.ui.open form you need to include the node option.
See for example here:
Looking at it quickly this seems to be the only line that needs changing.
See my commit here from another widget:
Essentially you need to include a location now. So if you include: location: "node" into your js. this should fix the issue.
This will be fixed in 7.15.0.