The blackboard variable of type TargetInfo, which is present on the Blackboard, as you can see, does sometimes show on the list and sometimes not. I have spent last 2 hours debugging and figuring this issue out, with no success.
It seems like its random whether the variable shows up or not.
And sometimes it decides to show up, but it works maybe 5% of the times…
From the image I can see that there is the message “No current Blackboard reference”. This is a known issue that happens only in lists. When adding an element to the list the blackboard reference is not automatically assigned until the next validation. You can however re-validate the graph manually in the toolbar menu (Edit -> Revalidate).