For whatever reason I can't see the upgrades for graphene radiators in the tech tree except for the one in nanolathing (I can see the nodes but not the upgrade icons in the preview). I'm playing on ksp 1.12.3 with kspie version 1.29.6 (I also had the problem with 1.29.5). I also had the problem with some of the other upgrades like the nuclear salt water reactor, but they were fixed once I redownloaded community tech tree.