Endless loading screen when in Ciudad Enamorada

I'm sorry if this sounds obvious - but have you tried to launch the game without  any mods in at all? If there are no problems without any mods in, then that indicates a mod is the problem. Then if that is the case you will need to do a 50/50 process. This means removing half the mods - if there is no problem then you know the problem is with one of the mods you removed, or if there is a problem it's due to a mod still in the game. Then keep whittling away with what mods you include/exclude until you end up with the one mod that causes the problem -  it's time consuming, but works. Don't save your game while doing any of this to avoid saving progress without your mods in - or if you feel compelled to save, do a save as. Sorry if you've tried all this, but it doesn't sound like you have isolated if it's a mod or not in your message.

I believe it's a mod. i did the 50/50 method but can't seem to isolate which mod. Hopefully i do soon.

You could take a look at Scarlet's list .. https://scarletsrealm.com/

shrtmz Start at the Broken/Updated Mods list linked in the sidebar.

This was happen to me after the last update.   In Game options down at the bottom click on directx 9.  I also had a problem with saving my game.   I have a ton of cc in my game and the update caused my game to take forever to load.   As soon as I went back to directx 9 my game loaded so fast it amazed me.   When I say I have a ton of cc that is a under statement.   I have 2 tb of cc on my computer.   I hope this helps you .

Mspoison_Ivyttv You can run a DX11 batch fix in Sims 4 Studio, but I'd also recommend spending some time going through your CC. I've never seen a folder that big that doesn't have duplicates, for example.