[CC and Milestones, error code 110-578ef827] Stuck On Loading Screen Sims 4

I am operating on Mac, my game is up to date, I do have mods/CC but it has not been enabled for months due to this issue.

Ever since the Life & Death update, I cannot load into my saved games active household. I can get into CAS and sometimes the manage worlds screen once very so often, but once I try to load into my active household, it's an endless rotating Plumbob. 

I feel like I have tried everything: I have uninstalled/re-installed the EA app, tried recovery with the EA app, tried repairing the game via the EA app, have tried moving my active household into a new lot, and have tried loading NPC households in a saved game (which does not work). I'm not sure what else to do. Any guidance or advice is appreciated. I did have a last exception report generated when I tried to load the game again just now, which is pasted below.

<?xml version="1.0" ?><root>
<report><version>2</version><sessionid>b479a19b4ab951a2673a34e6</sessionid><type>desync</type><sku>ea.maxis.sims4.15.macx86</sku><createtime>2024-11-17 11:28:12</createtime><buildsignature>Local.Unknown.Unknown.1.110.311.1220-1.300.000.196.Release</buildsignature><categoryid>developmental_milestone_tracker.py:1111</categoryid><desyncid>b479a19b4ab951a2673a34e6</desyncid><systemconfig/><screenshot/><desyncdata>Exception raised while processing zone spin up sequence: 'Object not found: 0xe773a003' (KeyError: 'Object not found: 0xe773a003')&#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 509, in update&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1705, in update&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1345, in on_update&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 738, in on_hit_their_marks&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 1130, 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 1200, in send_all_milestones_update_to_client&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\developmental_milestones\developmental_milestone_tracker.py", line 1111, in _get_milestone_update_msg&#13;&#10;KeyError: 'Object not found: 0xe773a003'rtim=0&#13;&#10;Client Session Time: 28.18&#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: 13,340,0,5853&#13; &#10;Modded: False&#13; &#10;SystemInfo: Mac OS X Version 15.1 (Build 24B83) GPU: Intel Iris Plus Graphics macOS Metal driver 0.0.0.0&#13; &#10;Architecture: x86_64&#13; &#10;</desyncdata></report>
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