[1.12.x] USI Life Support in Add-on Releases Posted June 11, 2021 1 hour ago, RoverDude said: Thanks! I know it's a pain, but it helps us see if there's a conflict somewhere, and it's appreciated. If everything still works, then it's something in the save and we can try clearing out all of the USI-LS persistence data and see if that fixes it. Ok. It's confirmed, and I feel like a bit of a dummy. Progressive Colonization System conflicts with USI LS. It even says so on its main forum page naming LS by name. Once that was removed it worked just fine. Derp!