Well I upgrades my buildings to foundrys and my guilds to the one above that I forget it's name anyway I any see them as I upgrade them so as I upgrade my subterranean factorys to foundry the foundry building doesn't appear it just shows the land as empty but when I click on it I can see the building info and stuff any advice or something?
It is most likely a connection problem. I would try restarting the game, and seeing if it fixes the problem. If you are on PC, log out and then back in again. If not, I would suggest emailing support, but most likely the problem is on your end.
I sometimes had similar problems on idevices and on PC. Closing the app and reloading it usually solves the problem. I once managed to sell some building during such a glitch. Looks like a cache not being refreshed.
I think this question has been answered. 1. Log out than in again. Or 2. If the issue does resolve contact support. /Lock I think