Hmmmm ...
AFAIK the AddOns folder should NOT be in the loaded libraries. It should be under Archicad folder. The library should also not be under the loaded libraries folder.
You have a housekeeping problem here
If you are in contact with Fabrizio, just ask him what is the intended folder layout, set it, and all will be well.
Djordje
ArchiCAD since 4.55 ... 1995
HP Omen