Interesting.
nickal320 ,
mlin32 ,
ottone and
Xandrios , were all legs in your itinerary operated by AF/KLM?
This week I received the same notice in my AF app for a flight departing from MCO and operated by VS and then connecting to KLM… but there was no voucher found anywhere in the app. I speculated that the message was a glitch due to the absence of a SkyTeam lounge in Terminal 1 (where VS check-in desks are), although I was able to use the Delta lounge in Terminal 2 (near the VS departure gate). But I don’t recall getting that message last month when flying out of that same airport in Terminal 3 (where check-in and departure gates for AF flights are), so that theory is admittedly weak.