all sims stuck/wont interact with eachother

Bripai95  Please test with no mods or custom content, as in, move the Mods folder to the desktop.  You don't need to save your progress.

If that doesn't help, please move your sims to a different lot, again as a test, and see whether they behave normaly.

i removed all my packs an put them into a separate folder onto my desktop and now since its just the base game only it is working fine . how do i find out which pack is messing up ?

I didn't mean move your expansion/game/stuff packs, only the Mods folder inside the Sims 4 user folder, as in, this one:

https://sims4.crinrict.com/eng/2018/07/how-to-find-your-user-folder/

I think it's fine to put back your packs, although you may need to restart your computer in order to do so.  If you really think one of your packs is a problem, add them back a few at a time and keep testing—finding the culprit shouldn't take too long.

I have this problem too. I have all packs, when lovestruck is enabled my sims wont interact with anything the most they will do is walk around. Theyre queue will also sometimes glitch out as if a command is being spammed but deleted instantly. I am a PC player, have no CC in game and without lovestruck it all works fine. 

kailatte  Are there any other differences between when you're playing with Lovestruck enabled and without?  For example, are the sims living in a different world, or going on dates?

Seems like its not Lovestrucks fault. It must have been the update as without the pack enabled my sim still cannot interact with anything. They will walk with no issues but they cant sit or lay down.  Instead the UI just changes states (will state sitting/sleeping etc) but the sim will just stand there. My sims also can't travel or move households, they just stare at their phone till I cancel the action. They used to dance on the spot but I cleared the thumbcache and they dont do that anymore but still refusing to interact :/

kailatte  Try completely clearing out your sims' inventories.  You don't need to save your progress; this is just for testing.

If that doesn't help, try moving the sims to a different house through Manage Worlds.  Use a default EA-made house, nothing from the Gallery or your own library.  Empty their inventories again.  Here too, you don't need to save your progress.

There wasn't anything in their inventories as I've tried a new save file and everything. I'll try the moving households and see if that helps but I've tried this on 2 separate saves now and still getting the same results, which sucks as the game is now literally unplayable. Is there any way to undo the update? As I'm certain that's what caused it to break. The sims team haven't mentioned anything about fixing this issue too, which is disheartening with the amount of time and money I have now put into this game.

im having a very similar issue where I click on my sims and nothing happens, no social options or anything, all they can do is walk around when but no autonomy either they just stand in place until i indicate for them to move and can’t interact with eachother or perform any actions at my command 

kailatte  You can't revert to the previous patch level, but if you want to try disabling some packs, here's how:

https://sims4.crinrict.com/eng/2017/03/disable-single-packs/