ISSUE:

The Landmark Pin on Kolguyev's Airport has a "Place" option available for the Game Master, but the only option is "Base with Support Structure" underneath "!MISSING NAME!". Selecting this however yields a "Invalid placement location" error that then applies to every single thing the Game Master tries to build from that point onward.

TROUBLESHOOTING:

It is possible to resolve the issue in-game by relinquishing Game Master and voting yourself back in, but that isn't always an easy option in multiplayer Game Master sessions.