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Reset your files to factory settings.
- Make a backup; copy your The Sims 4-folder from C:\Users\Username\Documents\Electronic Arts to an external drive or somewhere else on your computer, for example your desktop.
- Rename the The Sims 4-folder in C:\Users\Username\Documents\Electronic Arts to The Sims 4_backup
- Start the game, make a new save, and see if the error is gone.
(The game will have created a new The Sims 4-folder in your documents, this is supposed to happen)- If yes, continue
- If no, post a reply telling us the error is still there, and please post a DxDiag:
https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/
- Start putting folders back in the new The Sims 4-folder. Observe! After every file/folder, start the game and make sure it still works, before putting in the next one.
- Options.ini - your game settings
- Saves - your old saves. The sub-folders are not needed. If putting these back causes problem, try putting one back at a time.
- Screenshots
- Custom music - if you have any
- Tray - your library objects; like lots, rooms and sims
- Mods - your mods and cc, might cause problems when putting back
If putting back one of the folders was problematic and you did not work it out, please post a reply and we'll see if we can find what your problem is!
Source: https://help.ea.com/en-us/help/the-sims/the-sims-4/backing-up-and-resetting-the-sims-4/
Good Luck! 🙂
I’m currently having this issue and been having it for a while. I followed the steps on other occasions too and gave up a few times. I added one mod “MCCC” so that I could get an error report this time. I added the info below to see if that helps.
MC Command Center Last Exception Report
Last Exception support on Discord server * | Patron-only Last Exception support on Discord server | MCCC Website | Deaderpool's Patreon Page |
* = This channel requires a user to be verified as 'not a bot' before they can post there. Details are in the #server_info channel.
Sims 4 Add-On Details (Click to expand/collapse) MCCC Version Details (Click to expand/collapse) Full Mod List (Click to expand/collapse) Population Details (Click to expand/collapse) MC Command Center Last Exception Sep 19 - 01:27:27 Summary
- Last Module Called: T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker.py
- Last Function Called: evaluate_appearance_modifiers
- Error message: Exception in Sim Timeline: Exception running Element (AttributeError: 'MergingAppearanceModifier' object has no attribute 'should_refresh_thumbnail'), CategoryID: T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker:212
Sim Info (Click to expand/collapse) Pretty Error CallStack (Click to expand/collapse) Full Error CallStack (Click to expand/collapse) MC Command Center Last Exception Sep 19 - 01:37:24 Summary
- Last Module Called: T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker.py
- Last Function Called: evaluate_appearance_modifiers
- Error message: Exception in Sim Timeline: Exception running Element (AttributeError: 'MergingAppearanceModifier' object has no attribute 'should_refresh_thumbnail'), CategoryID: T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker:212
Sim Info (Click to expand/collapse) Pretty Error CallStack (Click to expand/collapse) Full Error CallStack (Click to expand/collapse) MC Command Center Last Exception Sep 19 - 01:37:39 Summary
- Last Module Called: T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker.py
- Last Function Called: evaluate_appearance_modifiers
- Error message: Exception in Sim Timeline: Exception running Element (AttributeError: 'MergingAppearanceModifier' object has no attribute 'should_refresh_thumbnail'), CategoryID: T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker:212
Sim Info (Click to expand/collapse) Pretty Error CallStack (Click to expand/collapse) Full Error CallStack (Click to expand/collapse) MC Command Center Last Exception Sep 19 - 01:38:50 Summary
- Last Module Called: T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker.py
- Last Function Called: evaluate_appearance_modifiers
- Error message: Sim Emi Fujita failed to add buff NateTheL0ser_PrivatePracticeAllergens_SomethingInTheAir from state. Commodity:Commodity(NateTheL0ser_PrivatePracticeAllergens_AllergictoLeafMold/2408667012@0.0), Sim LOD:SimInfoLODLevel.BACKGROUND (AttributeError: 'MergingAppearanceModifier' object has no attribute 'should_refresh_thumbnail'), CategoryID: T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker:212
Sim Info (Click to expand/collapse) Pretty Error CallStack (Click to expand/collapse) Full Error CallStack (Click to expand/collapse) MC Command Center Last Exception Sep 19 - 01:40:17 Summary
- Last Module Called: T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker.py
- Last Function Called: evaluate_appearance_modifiers
- Error message: Exception in Sim Timeline: Exception running Element (AttributeError: 'MergingAppearanceModifier' object has no attribute 'should_refresh_thumbnail'), CategoryID: T:\InGame\Gameplay\Scripts\Server\buffs\appearance_modifier\appearance_tracker:212
Sim Info (Click to expand/collapse) Pretty Error CallStack (Click to expand/collapse) Full Error CallStack (Click to expand/collapse)
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