Lure of the wildcat currency reward bug

According to wiki it says Invitation Cards can be traded to Naja Salaheem for Imperial Currency after completing Immortal Sentries. You can only trade all your collected Invitation cards or refuse. You get the title Wildcat Publicist. I'm on mission 12 Royal Puppeteer and Naja still doesn't give dialog for reward for doing all four wildcat invitation card quests which is 1 Imperial Mythril Piece.