Cannot save because "Game Loading is in progress"

Today I had the same problem "game loading is in progress". It properly pissed me off after not finding any answers online, i moved all of my mods from the folder to my desktop, only to find that the mods weren't the problem. I have fixed the issue but have no idea what was the cause. I checked whether /that/ particular family on sims had that problem, and it did. I moved it to my "other households'' which seemed to do the trick, if people are having that problem try moving your household. Cheers.