I don't know why, but I can't enter any Fort Interior. The doors are labelled "Exit to" followed by the name of the fort. Everything else works fine, but I have to use the COC cheat to enter a fort. Can somebody help me, please?

I suspect you have a bad mod somewhere. Someone might have messed up all the fort doors by accident by making a change related to that object used at multiple forts. You might test this theory by temporarily disabling all your mods to see if the doors work again. If you do have a bad mod, be suspicious of your most recent additions. It might be a long hard round of play-testing slowly removing mods a few at a time to pinpoint the bad mod.

Thank you very much. Found the mod very fast. Now everything is in order.