or something like that, can't recall the exact wording and have only two hours so can't view my Economy page.
Trying to expand RCs, I *sometimes* get that message. My first RC I could expand; my other two could not. I have tried in separate turns & separate turns from when built.
I have no idea if it is because of some actual game restriction or if that is just an error message that something internally is going wrong. (This is on Dwilight)