Unable to 'Cheer' Sims on while another is singing

Usually when a Sim sings in public, other Sims can 'cheer' them on or 'boo' them. They can also 'watch' them.

But recently I can't do these actions. All the Sims freeze or just stand idle for a few minutes and then a Better Exceptions report comes up. The file explains the error as ' Error instantiating affordance: (AttributeError: 'watch_Mixer_Fast_Clap' object has no attribute '_liabilities_to_transfer_to_si'), CategoryID: mixer_interaction:350' 

I have many Mods and CC installed, but I am not sure if this error is Base Game, or Dlc or Mod/CC related.  I'm on Windows laptop. 

Any reply to this would be appreciated!