I took over a world with many Deep Beron mines but I have several Lvl 2 mines and the upgrade to deep lvl 3 is grayed out despite all persons power and resources. Is there a limit?? Same for the level 2 Limbolt
You can’t upgrade another civilizations buildings if you are a different race.
I’ll make sure we have a task for this to be looked at. The reason why they can’t be upgraded should be clear.