Only the top 3 items on the left side are researchable. The rest of the items are greyed out. The top icon in the tree for these items appears to be locked. I have never seen this before.
Early Access build 118201. I have just finished all goals to level 4. I have found Caterium for example but cannot research it.
Could this have been a result of mods? All seem to be working fine.
Programmable Elevators 2.2.1
Refined Power 2.0.4
Upside Down Foundations and More 0.0.2
10+ Inventory Slots 0.0.1
Utility Signs 1.0.0
Pak Utility Mod 0.3.1
Passive Mode 0.2.2