I see partly the same problem. Everyone who plays now, knows its early acess and development in work.
In my opinion this game must change in many aspects to sell after the release of the version 1.0 and its only four months to the planed relea…
I have also this problem in experimental mode. In all four playmodes I can not build the Mulipurpose Room, the Scanner Room or the Observatory Room.
All other elements of a base can be build.