How can I interpret the last exception file?

hii, i was directed to you guys for help. i've been playing a save for over a year now and recently my sims have been disappearing. These sims were in my "played households" and all in houses. It tends to target my played households more, only a few townees have been disappearing. I keep getting last exceptions, below is part of one. if someone could help me i would appreciate it a ton.


2ce72f41bd3fec0545b21b101desyncea.maxis.sims4_64.15.pc2018-06-13 20:07:49Local.Unknown.Unknown.1.43.14.1020-1.200.000.339.Releaseappearance_modifier.py:226ce72f41bd3fec0545b21b101 Sim 21397740777524833 failed to load (TypeError: Failed to parse argument.) Traceback (most recent call last): File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 111, in wrapped File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 107, in finally_wrap File "T:\InGame\Gameplay\Scripts\Core\sims4\utils.py", line 174, in wrapper File "T:\InGame\Gameplay\Scripts\Core\sims4\utils.py", line 192, in wrapper File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 347, in c_api_client_connect File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 536, in do_zone_spin_up File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1178, in update File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 206, in on_enter File "T:\InGame\Gameplay\Scripts\Server\sims\household_manager.py", line 81, in load_households File "T:\InGame\Gameplay\Scripts\Server\sims\household_manager.py", line 161, in _load_household_from_household_proto File "T:\InGame\Gameplay\Scripts\Server\sims\household.py", line 1096, in load_data File ".\mc_utils.py", line 114, in _wrapper_function File "T:\InGame\Gameplay\Scripts\Server\sims\household.py", line 1085, in load_data File "T:\InGame\Gameplay\Scripts\Server\sims\sim_info.py", line 2600, in load_sim_info File "T:\InGame\Gameplay\Scripts\Server\sims\sim_info.py", line 2742, in _load_sim_info File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 767, in load File "T:\InGame\Gameplay\Scripts\Server\sims\occult\sim_info_with_occult_tracker.py", line 72, in add_trait File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 61, in add_trait File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 392, in _add_trait File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 634, in _add_buffs File "T:\InGame\Gameplay\Scripts\Server\objects\components\__init__.py", line 440, in exported_func File "T:\InGame\Gameplay\Scripts\Server\objects\components\buff_component.py", line 297, in add_buff File "T:\InGame\Gameplay\Scripts\Server\buffs\buff.py", line 995, in on_add File "T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker.py", line 95, in add_appearance_modifiers File "T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker.py", line 158, in evaluate_appearance_modifiers File "T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_modifier.py", line 226, in combinable_sorting_key TypeError: Failed to parse argument.
2ce72f41bd3fec0545b21b101desyncea.maxis.sims4_64.15.pc2018-06-13 20:07:50Local.Unknown.Unknown.1.43.14.1020-1.200.000.339.Releaseappearance_modifier.py:226ce72f41bd3fec0545b21b101 Sim 659785197400491370 failed to load (TypeError: Failed to parse argument.) Traceback (most recent call last): File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 111, in wrapped File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 107, in finally_wrap File "T:\InGame\Gameplay\Scripts\Core\sims4\utils.py", line 174, in wrapper File "T:\InGame\Gameplay\Scripts\Core\sims4\utils.py", line 192, in wrapper File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 347, in c_api_client_connect File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 536, in do_zone_spin_up File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1178, in update File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 206, in on_enter File "T:\InGame\Gameplay\Scripts\Server\sims\household_manager.py", line 81, in load_households File "T:\InGame\Gameplay\Scripts\Server\sims\household_manager.py", line 161, in _load_household_from_household_proto File "T:\InGame\Gameplay\Scripts\Server\sims\household.py", line 1096, in load_data File ".\mc_utils.py", line 114, in _wrapper_function File "T:\InGame\Gameplay\Scripts\Server\sims\household.py", line 1085, in load_data File "T:\InGame\Gameplay\Scripts\Server\sims\sim_info.py", line 2600, in load_sim_info File "T:\InGame\Gameplay\Scripts\Server\sims\sim_info.py", line 2742, in _load_sim_info File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 767, in load File "T:\InGame\Gameplay\Scripts\Server\sims\occult\sim_info_with_occult_tracker.py", line 72, in add_trait File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 61, in add_trait File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 392, in _add_trait File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 634, in _add_buffs File "T:\InGame\Gameplay\Scripts\Server\objects\components\__init__.py", line 440, in exported_func File "T:\InGame\Gameplay\Scripts\Server\objects\components\buff_component.py", line 297, in add_buff File "T:\InGame\Gameplay\Scripts\Server\buffs\buff.py", line 995, in on_add File "T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker.py", line 95, in add_appearance_modifiers File "T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker.py", line 158, in evaluate_appearance_modifiers File "T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_modifier.py", line 226, in combinable_sorting_key TypeError: Failed to parse argument.
2ce72f41bd3fec0545b21b101desyncea.maxis.sims4_64.15.pc2018-06-13 20:07:50Local.Unknown.Unknown.1.43.14.1020-1.200.000.339.Releaseappearance_modifier.py:226ce72f41bd3fec0545b21b101 Sim 722833485767705216 failed to load (TypeError: Failed to parse argument.) Traceback (most recent call last): File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 111, in wrapped File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 107, in finally_wrap File "T:\InGame\Gameplay\Scripts\Core\sims4\utils.py", line 174, in wrapper File "T:\InGame\Gameplay\Scripts\Core\sims4\utils.py", line 192, in wrapper File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 347, in c_api_client_connect File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 536, in do_zone_spin_up File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1178, in update File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 206, in on_enter File "T:\InGame\Gameplay\Scripts\Server\sims\household_manager.py", line 81, in load_households File "T:\InGame\Gameplay\Scripts\Server\sims\household_manager.py", line 161, in _load_household_from_household_proto File "T:\InGame\Gameplay\Scripts\Server\sims\household.py", line 1096, in load_data File ".\mc_utils.py", line 114, in _wrapper_function File "T:\InGame\Gameplay\Scripts\Server\sims\household.py", line 1085, in load_data File "T:\InGame\Gameplay\Scripts\Server\sims\sim_info.py", line 2600, in load_sim_info File "T:\InGame\Gameplay\Scripts\Server\sims\sim_info.py", line 2742, in _load_sim_info File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 767, in load File "T:\InGame\Gameplay\Scripts\Server\sims\occult\sim_info_with_occult_tracker.py", line 72, in add_trait File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 61, in add_trait File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 392, in _add_trait File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 634, in _add_buffs File "T:\InGame\Gameplay\Scripts\Server\objects\components\__init__.py", line 440, in exported_func File "T:\InGame\Gameplay\Scripts\Server\objects\components\buff_component.py", line 297, in add_buff File "T:\InGame\Gameplay\Scripts\Server\buffs\buff.py", line 995, in on_add File "T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker.py", line 95, in add_appearance_modifiers File "T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker.py", line 158, in evaluate_appearance_modifiers File "T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_modifier.py", line 226, in combinable_sorting_key TypeError: Failed to parse argument.