Re: sims 4 crashing at loading screen
@jazzie205 Please remove your mods and keep them removed while troubleshooting. It's always best to remove any complicating factors until the game is stable again.
If you get another crash when trying to close the pop-up, try launching the game in windowed mode. Go into Documents > Electronic Arts > The Sims 4, open Optiions.ini, search for fullscreen , and set it to 0 (zero).
For the missing packs, I think at this point, the best approach is to uninstall Sims 4 with Revo as well, and reinstall it. Before doing so, rename the Sims 4 folder in Documents > Electronic Arts to something that doesn't include "Sims 4" so Revo doesn't flag it for deletion.