Sims 4 infinite loading after exiting CAS

GothicSimmer21​  I've split your post into its own thread.  Please remove your Mods folder if you have anything inside it other than Resource.cfg.  Please remove anything inside ConfigOverride as well.

I can open my game, I can edit my sims but I can't actually play the game because every time I try it ends up getting stuck on the loading screen for hours {see video below}. I have no mods or cc, I have deleted the localthumbcache which I was told to do but it didn't work, my laptop has got plenty of RAM to run sims and I repaired my game several times but my game is still broken. Can someone help me get back to my beloved game please? 

GothicSimmer21​  Does this happen only when loading one household in one save, all households in one save, or a new household in a new save?  Please test other households and a new save if you haven't already.

If the new save at least is fine, I'd like to see a lastexception from your main save.  Open Documents > Electronic Arts > The Sims 4 and delete any lastexception files you see.  Try again to load this save, and if and when it doesn't work, look for a new LE.  If you find one, open it (Notepad is fine), copy its text, and paste it into a reply here.

If the new save doesn't load, please provide a dxdiag.  Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop.  From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.

My game will go to the main screen but when I try to resume my game, it gets stuck on the loading screen forever. 

I have been wanting to play my beloved game The Sims 4 but every time I try it gets stuck on an infinite loading screen that lasts for hours.

I have made a brand new save file and a new Sims 4 folder, I have repaired the game multiple times, I have renamed my old folder so I don't get confused and I have no mods or cc. I have had this issue for days now and wondering why it's not been fixed yet.

I have even tried searching for the problem in my bowser but nothing worked. I have tried getting in touch with the EA team about it but I just received a message saying that my issue is not covered by our advisors.

I have attached a video of the issue that I am currently facing. I was happening in the old save as well as my new one. 

Hi GothicSimmer21​ 

Do you have any LastException files in Documents\Electronic Arts\The Sims 4 ?

• Delete the ones you have
• Trigger the error again
• Check if new ones are created
• If that is the case, please copy/paste the content here. You can open the file with any text editor.

Deleting the file won't fix your issue. Posting the info is meant for troubleshooting. 

I have just looked and can see no LastException files in my Sims 4 folder. I just did a driver update on my PC and a regular update and repaired the game again through the EA app but non of those have worked. Is there anything else I can try I don't really want to start from scratch but if that will fix it I will 

This is the last exception I got:

"<?xml version="1.0" ?><root>

<report><version>2</version><sessionid>570250830615161b6abf0322</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2026-10-01 18:09:32</createtime><buildsignature>Local.Unknown.Unknown.1.128.90.1030-1.200.000.718.Release</buildsignature><categoryid>developmental_milestone_tracker.py:1130</categoryid><desyncid>570250830615161b6abf0322</desyncid><systemconfig/><screenshot/><desyncdata>Exception raised while processing zone spin up sequence: 'Object not found: 0x858cd2f3' (KeyError: 'Object not found: 0x858cd2f3')&#13;&#10;Traceback (most recent call last):&#13;&#10;&#13;&#10; File "T:\InGame\Gameplay\Scripts\Core\sims4\utils.py", line 179, in wrapper&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 222, in c_api_server_tick&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 515, in update&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1894, in update&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1526, in on_update&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 744, in on_hit_their_marks&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 1145, in _set_zone_state&#13;&#10; File "T:\InGame\Gameplay\Scripts\Core\sims4\callback_utils.py", line 158, in __call__&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\developmental_milestones\developmental_milestone_tracker.py", line 1225, in send_all_milestones_update_to_client&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\developmental_milestones\developmental_milestone_tracker.py", line 1130, in _get_milestone_update_msg&#13;&#10;KeyError: 'Object not found: 0x858cd2f3'rtim=0&#13;&#10;Client Session Time: 22.92&#13; &#10;Num Save Errors: 0&#13; &#10;Num Load Errors: 0&#13; &#10;Current Game State: 0x96d01090&#13; &#10;LoadingScreenActiveFlag: 1&#13; &#10;Origin Version: 13,796,0,6309&#13; &#10;Modded: False&#13; &#10;SystemInfo: Windows 11 10.0.26200 GPU: Intel(R) UHD Graphics 27.20.100.8729, GUID: 8B8FA794-F06F-11EF-9E6B-9A6BC5FDBCBE&#13; &#10;</desyncdata></report>

</root>"

Does this help at all?

soulshine1128​  Please install this mod (and reenable mods in the game options):

https://www.patreon.com/posts/mod-milestone-81237568

If it doesn't help, leave the mod in place, but don't add any others, and provide a new LE.

If it's every save and no indications what it could be it's a bit hard to tell.

Are you playing through EA app or Steam ?

Could you post your Computer's DxDiag?

• Press Windows-Key + R
• Type: DxDiag
• Click on Save all Information.
• Attach the Text File to your post