I’m on MacOS 10.13.5 - I’m usually slow to upgrade because of music software. (And of course TotalFinder and TotalSpaces)
I just auto-upgraded TotalSpaces to 2.7.9 and I stopped being able to change Spaces. It couldn’t detect any desktops even though I have four active (2x2 grid in TS). I downgraded to 2.7.7 and it’s fine again.