The Nocturne Wooden Buckler broke my game

i haven't been able to get into character since I equipped the Nocturne Wooden Buckler, a written error appears: "Metadataa/Effects/misc/Uniques/shield/buckler/Nocturne/ao/off_balance ":Error:
Metadataa/Effects/misc/Uniques/shield/buckler/Ncturne/ao/off_balance.ao is non-virtual and does not have a physical file. Does anyone know what I can do?