The thumbnail doesn't reflect this, but do you have more than 8 sims in this household? If so, the NRaas Mover mod is required to work with overstuffed households in that manner. Would that one be in play?

Er, hmm. That's the screen Edit Town is supposed to give us when we ask it to select a different household to play. Not one from which we can edit households and do split/moves and saves to the bin. Does this happen if a different household is actually active with the game clock having run smoothly, you go to Edit Town, and just click on the one you are testing just above?

I really doubt that it's an NRaas mod interfering (unless one of the sims in your household of 8 is pregnant), but to check if you are still suspicious, a test run with all NRaas mods removed and the scriptCache.package file cleared would be required.

The point of removing mods to test something is to do so on a copy of one of your saved games to help determine if there is a conflict or if something unexpected is getting in the way. Not to do so on the actual save(s) you are intending to play forward. Sorry for not being clear, that's what I meant by a "test run," which itself doesn't need to be saved.

Of course you would want to put your mods back in play when ready to resume actual gameplay.

I'm still a little suspicous of the household of 8. If the game" thinks" there are still 9 or more sims there, that might be what is blocking things without Mover in play but this is only just a theory right now.