Sims invited over don't show up

@wiwarez  Please start a new save and see whether the problem is still present.  If it's not, switch to playing a different family within your current save and test.  You don't have to save your progress; just see whether sims show up when invited, then quit without saving.  Let me know what happens.

If new sims in a new save can't get their friends to show up, please move your entire Sims 4 folder out of Documents\Electronic Arts and onto your desktop.  Launch the game, which will create a clean folder with no content.  Don't add anything back to it; just start another new save and test.