So, after much back and forth it looks like some festival stuff got stuck causing the issues with the lot.
Cleaning stuff up in S4Studio solved the issue.
Thank you, here it is.
<?xml version="1.0" ?><root>
<report><version>2</version><sessionid>981b64d784ca2a2469ef1f49</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2026-04-27 10:49:54</createtime><buildsignature>Local.Unknown.Unknown.1.123.66.1030-1.200.000.704.Release</buildsignature><categoryid>log.py:899</categoryid><desyncid>981b64d784ca2a2469ef1f49</desyncid><systemconfig/><screenshot/><desyncdata>Exception during SI.cancel running sim_BeAffectionate:51 on , cancel_reason_msg is object destroyed: (AssertionError: [EventManager] [sscholl] Attempting to register event:TestEvent.AgedUp with handler:<relationships.sentiment_track_tracker.SentimentTrackTracker object at 0x00007FF47E630690> when the EventManagerService is disabled.) Traceback (most recent call last): File "T:\InGame\Gameplay\Scripts\Server\interactions\interaction_queue.py", line 901, in _head_change_watcher File "T:\InGame\Gameplay\Scripts\Server\interactions\interaction_queue.py", line 985, in _get_head File "T:\InGame\Gameplay\Scripts\Server\interactions\interaction_queue.py", line 97, in get_next_unblocked_interaction_cancel_incompatible File "T:\InGame\Gameplay\Scripts\Server\interactions\social\social_super_interaction.py", line 1182, in notify_queue_head File "T:\InGame\Gameplay\Scripts\Server\interactions\social\social_super_interaction.py", line 644, in _get_close_to_target_and_greet File "T:\InGame\Gameplay\Scripts\Server\interactions\social\social_super_interaction.py", line 596, in _greet_sim File "T:\InGame\Gameplay\Scripts\Server\interactions\social\greeting_socials\greetings.py", line 53, in add_greeted_rel_bit File "T:\InGame\Gameplay\Scripts\Server\relationships\relationship_tracker.py", line 257, in add_relationship_bit File "T:\InGame\Gameplay\Scripts\Server\relationships\relationship_service.py", line 828, in add_relationship_bit File "T:\InGame\Gameplay\Scripts\Server\relationships\relationship_service.py", line 1270, in _find_relationship File "T:\InGame\Gameplay\Scripts\Server\relationships\relationship_objects\sim_relationship.py", line 45, in __init__ File "T:\InGame\Gameplay\Scripts\Server\relationships\data\unidirectional_relationship_data.py", line 49, in __init__ File "T:\InGame\Gameplay\Scripts\Server\relationships\sentiment_track_tracker.py", line 217, in __init__ File "T:\InGame\Gameplay\Scripts\Server\event_testing\event_manager_service.py", line 172, in register_single_event File "T:\InGame\Gameplay\Scripts\Core\sims4\log.py", line 899, in assert_raise with handler:<relationships.sentiment_track_tracker.SentimentTrackTracker object at 0x00007FF47E630690> when the EventManagerService is disabled.rtim=0 Client Session Time: 34.27 Num Save Errors: 0 Num Load Errors: 0 Current Game State: 0x96d01090 LoadingScreenActiveFlag: 1 Origin Version: 13,690,2,6204 Modded: True SystemInfo: Windows 11 10.0.26200 GPU: NVIDIA GeForce RTX 4060 Laptop GPU 32.0.15.6624, GUID: D34574AF-EBFB-11EF-AFC7-DAAD6276EE29 </desyncdata></report>
</root>
