Hello, Looking at the instructions for Citadels of Shadow, it says that the scenario needs 'a secret weapon' card, but I can't find it in the core or the expansion pack. The deck does include 'a hidden intelligence' but that's not listed in the instructions.
Thanks for spotting! I'll need to ask our layout artist to make some corrections. Will post again when the updated files are up.
(Secret weapon belongs in The Sea Hungers, and as you've surmised the setting card should be marked "setting". Both are still playable as-is - just in case you've got a session booked!)