Missing Ridhais
Did you use the character that completed the quest?
I did. Actually I have changed Caladbolg on this character before (for the skin collection achivement), but it was some time after release of those current events. Recently after latest episode of Living World I tried to swap again and found out that NPC was missing.
I dunno. You can contact the CS Team via the ‘Support’ link above/below. And/or try a -repair of the client (same link) in case of corrupted files.
Good luck.