Game won’t load after pop up

marinad327  Does this happen with no mods or custom content, as in, when you move the Mods folder to the desktop?  That would be the first test.  I understand that this is intermittent and therefore difficult to test, but you could try with a clean user folder.  The second time you launch, you should get pop-ups for every single pack you own.

To test in a clean folder, move or rename the existing Sims 4 folder in Documents > Electronic Arts.  This will prevent the game from reading your existing user data, including saves, mods, and the flag that you've already seen the pack-related pop-ups.  When you want to go back to using your content, trash the new Sims 4 folder and restore the original.

Another possible cause, if this turns out not to be mod-related, is an overlay that's running alongside the game.  You can disable the Steam and EA App in-game overlays, or just not open Steam if you don't need it to play; Discord comes with an overlay as well.