Investigating Game Launch & Save File Issues

Does the game launch at all? yes. 2. sometimes

Does the game load, but buildings, lots, worlds, or Sims are missing? yes. 

Is this happening to every save, or one specific save? so far some (2) but not all.

Does this happen on new saves as well? yes both bugged saves were new.

Do you use mods? yes.

Does the issue persist after all mods are removed? yes.

Have you tried repairing your game while mods are removed? yes.

Does the issue persist after repair? yes.

Have you tried uninstalling/reinstalling the game? no.