No, it has nothing to do with Luxembourg whatsoever. The only option similar to the one you mention is the "nation club managers", which I understand as club managers from the nation in question. However, I'm not sure how that would work in the game. The problem might be in the fact that no club competition is set for the award because national (Lithuanian) team managers became eligible for the award last year, i.e. 2017. Perhaps that's where the game gets confused. Voters are set to "competition managers" but there's no actual competition set in the award parameters. I'll see what I can do. Thanks for the heads-up anyway.