Third hotfix for MCCC is available now. 4.4.3 should download and work fine from Tumblr or Patreon or Deaderpool's page.
Fixes for this hotfix:
This hotfix allows Sims 4 to load into lots with MCCC installed. There are no errors thrown by the initial loading.
Fixed a problem with households with more than 8 Sims that prevented the lots from loading.
Fixed an issue with Game Time Speed that was preventing it from working.
Fixed an issue with Maximum Sims on Lot setting causing exceptions when Walkby situations were generated.
