Here is the last exception file copy and pasted! Sorry for not including it! It took me about a sims week in a save to replicate the error with no mods in the game.
<?xml version="1.0" ?><root>
<report><version>2</version><sessionid>ddcdaa07114196b768c8663e</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2025-09-15 14:20:31</createtime><buildsignature>Local.Unknown.Unknown.1.117.244.1020-1.300.000.220.Release</buildsignature><categoryid>sim_info.py:3388</categoryid><desyncid>ddcdaa07114196b768c8663e</desyncid><systemconfig/><screenshot/><desyncdata>[manus] Save failed due to Exception (AttributeError: 'NoneType' object has no attribute 'back') Traceback (most recent call last): Caught and logged: File "T:\InGame\Gameplay\Scripts\Server\services\persistence_service.py", line 609, in _fill_and_send_save_game_protobufs_gen File "T:\InGame\Gameplay\Scripts\Core\sims4\service_manager.py", line 543, in save_all_services File "T:\InGame\Gameplay\Scripts\Server\zone_manager.py", line 122, in save File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 1775, in save_zone File "T:\InGame\Gameplay\Scripts\Server\game_services.py", line 50, in save_all_services File "T:\InGame\Gameplay\Scripts\Core\sims4\service_manager.py", line 543, in save_all_services File "T:\InGame\Gameplay\Scripts\Server\sims\sim_info_manager.py", line 155, in save File "T:\InGame\Gameplay\Scripts\Server\sims\sim_info.py", line 3154, in save_sim File "T:\InGame\Gameplay\Scripts\Server\sims\sim_info.py", line 3195, in _save_sim_base File "T:\InGame\Gameplay\Scripts\Server\sims\sim_info.py", line 3388, in _generate_sim_protocol_buffer AttributeError: 'NoneType' object has no attribute 'back'rtim=0 Client Session Time: 24.75 Num Save Errors: 0 Num Load Errors: 0 Current Game State: 0x96d01090 LoadingScreenActiveFlag: 1 Origin Version: 13,550,0,6063 Modded: False SystemInfo: Windows 11 10.0.26100 GPU: NVIDIA GeForce RTX 4060 nvd3dum.dll 32767.65535.65535.65535, GUID: B7721006-4123-36E4-2487-A30CDFB4BA67 </desyncdata></report>
<report><version>2</version><sessionid>ddcdaa07114196b768c8663e</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2025-09-15 14:40:19</createtime><buildsignature>Local.Unknown.Unknown.1.117.244.1020-1.300.000.220.Release</buildsignature><categoryid>animation_utils.py:659</categoryid><desyncid>ddcdaa07114196b768c8663e</desyncid><systemconfig/><screenshot/><desyncdata>Exception in Sim Timeline: Exception running Element (RuntimeError: ASM :: Soc_Entertain_TellStory (HANDLE :: 46544)>: Attempt to traverse between two states (TellStory -> exit) where no valid path exists! Actors {'x': (<weakref at 0x00007FF4C9B84260; to 'object_sim' at 0x00007FF4BD404AD0>, None, <AnimationParticipant.ACTOR = 101>)} (debug context: (<Interaction mixer_socials_TellFunnyStory_group_Funny_alwaysOn id:10909 sim:>, ASM :: Soc_Entertain_TellStory (HANDLE :: 46643)>))) Traceback (most recent call last): File "T:\InGame\Gameplay\Scripts\Server\scheduling.py", line 231, in simulate File "T:\InGame\Gameplay\Scripts\Server\elements.py", line 376, in _run File "T:\InGame\Gameplay\Scripts\Server\animation\animation_element.py", line 218, in do_begin File "T:\InGame\Gameplay\Scripts\Server\animation\animation_utils.py", line 659, in get_auto_exit File "T:\InGame\Gameplay\Scripts\Server\animation\asm.py", line 1160, in requestRuntimeError: ASM :: Soc_Entertain_TellStory (HANDLE :: 46544)>: Attempt to traverse between two states (TellStory -> exit) where no valid path exists! Actors {'x': (<weakref at 0x00007FF4C9B84260; to 'object_sim' at 0x00007FF4BD404AD0>, None, <AnimationParticipant.ACTOR = 101>)} (debug context: (<Interaction mixer_socials_TellFunnyStory_group_Funny_alwaysOn id:10909 sim:>, ASM :: Soc_Entertain_TellStory (HANDLE :: 46643)>))rtim=0 Client Session Time: 24.75 Num Save Errors: 0 Num Load Errors: 0 Current Game State: 0x96d01090 LoadingScreenActiveFlag: 1 Origin Version: 13,550,0,6063 Modded: False SystemInfo: Windows 11 10.0.26100 GPU: NVIDIA GeForce RTX 4060 nvd3dum.dll 32767.65535.65535.65535, GUID: B7721006-4123-36E4-2487-A30CDFB4BA67 </desyncdata></report>
<report><version>2</version><sessionid>ddcdaa07114196b768c8663e</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2025-09-15 14:52:04</createtime><buildsignature>Local.Unknown.Unknown.1.117.244.1020-1.300.000.220.Release</buildsignature><categoryid>story_progression_action_relationship_culling.py:89</categoryid><desyncid>ddcdaa07114196b768c8663e</desyncid><systemconfig/><screenshot/><desyncdata>Exception in Sim Timeline: Exception running Element (AttributeError: 'NoneType' object has no attribute 'sim_id') Traceback (most recent call last): File "T:\InGame\Gameplay\Scripts\Server\scheduling.py", line 231, in simulate File "T:\InGame\Gameplay\Scripts\Server\alarms.py", line 293, in _run File "T:\InGame\Gameplay\Scripts\Server\story_progression\story_progression_service.py", line 335, in _process_next_action File "T:\InGame\Gameplay\Scripts\Server\story_progression\story_progression_service.py", line 353, in process_action_index File "T:\InGame\Gameplay\Scripts\Server\story_progression\story_progression_action_relationship_culling.py", line 82, in process_action File "T:\InGame\Gameplay\Scripts\Server\story_progression\story_progression_action_relationship_culling.py", line 138, in trigger_npc_relationship_culling File "T:\InGame\Gameplay\Scripts\Server\story_progression\story_progression_action_relationship_culling.py", line 89, in _trigger_relationship_telemetry File "T:\InGame\Gameplay\Scripts\Server\performance\performance_commands.py", line 754, in get_relationship_metricsAttributeError: 'NoneType' object has no attribute 'sim_id'rtim=0 Client Session Time: 24.75 Num Save Errors: 0 Num Load Errors: 0 Current Game State: 0x96d01090 LoadingScreenActiveFlag: 1 Origin Version: 13,550,0,6063 Modded: False SystemInfo: Windows 11 10.0.26100 GPU: NVIDIA GeForce RTX 4060 nvd3dum.dll 32767.65535.65535.65535, GUID: B7721006-4123-36E4-2487-A30CDFB4BA67 </desyncdata></report>
</root>
