I have a custom ActionTask. I use AssetReference type field in this task. NodeCanvas cannot show AssetReference properly in the node inspector. Also, blackboard has the same problem.
I hope NodeCanvas still has support.
public BBParameter<AssetReference> AssetReference;
NodeCanvas is definitely still supported and worked on :). Unfortunately however AssetReference is not yet by the inspector. I will look at supporting this in the inspector after summer vacation. Thank you.