Hiero effects don't load in Nuke anymore

Since the update of the core where we have a “product type” and a “product base type” we can’t load effect anymore in nuke.
I’m trying to figure out where the problem lies but not quite sure if we need to fix it in Hiero, Nuke or Core.

If i go back to a older “core” version where “Product base type” isn’t introduced it works again.