Sims 4 Mod Problems After the August 2026 Update: How to Check Your Mods

The Sims 4 shipped two updates in August 2026: a hotfix on August 6 focused on save reliability, and a larger update on August 25 (patch 1.127) that added new Create-a-Sim content and a Marketplace image cache. If your mods started acting up recently, it's almost certainly the August 25 patch — here's what changed and how to tell whether your mods folder is actually the problem.

For general mod troubleshooting beyond this patch, see our complete Sims 4 mod troubleshooting guide.

What the August Updates Changed

August 6 Hotfix

• Fixed a crash affecting console and travel that happened right after loading a save.
• Save Reminders now default to Every 2 Hours instead of Off.
• Fixed a bug where loading an autosave and then saving manually could overwrite the wrong save slot.
• Autosave and save-reminder timers no longer reset when your Sims travel.

(EA's official notes for the August 6 hotfix.)

August 25 Update (Patch 1.127)

• Added a Marketplace image cache for faster browsing and shorter load times.
• Added 6 new CAS assets, 5 new Styled Looks, and 5 new Starter Sims.
• Fixed a PlayStation launch crash and some Marketplace navigation issues.

What's Breaking

UI Mods (Highest Risk This Patch)

Mods that redraw or extend game menus are the ones showing up most in reports right now — things like UI Cheats Extension, More Columns in CAS, Better BuildBuy, T.O.O.L., More Traits in CAS, and custom UI color or dark-theme overrides. Symptoms include distorted menus, missing text labels, overlapping dialogue windows, and needs-bar sliders that don't respond. The community-maintained broken-and-updated-mods thread on EA's forums is the most current source for which specific mods have already been fixed by their creators.

Script Mods

Script mods are worth checking after any patch because they can depend on game internals.

Pure CC (Lower Risk)

Hair, clothing, and furniture CC may be less likely to be affected than script or UI mods, but check the creator's page if problems appear.

How to Check Whether It's Your Mods

Option 1: The Manual Way (50/50 Method)

1. Remove half your mods from the folder.
2. Launch the game and see if the problem is still there.
3. If it's gone, the problem was in the half you removed. Put that half back and remove the other half.
4. Keep splitting in half until you isolate the mod.

Large Mods folders can require many testing rounds.

Option 2: Scan Instead of Guess

Sims 4 Mod Fixer scans your mods folder and checks every .package and .ts4script file against the current game version, flagging likely broken script imports, outdated tuning overrides, and duplicate files. It helps you narrow down where to look — it can't guarantee it catches every possible conflict, since some compatibility issues only show up once you actually load the game, but it saves you from splitting folders by hand.

Quick Fixes Worth Trying First

1. Re-enable mods after the patch. Every Sims 4 update disables script mods automatically. Go to Game Options → Other → check "Enable Custom Content and Mods" and "Script Mods Allowed," then restart the game.
2. Delete cache files. Go to Documents/Electronic Arts/The Sims 4 and delete localthumbcache.package plus everything inside the "cache" folder. The game rebuilds these automatically.
3. Update MCCC first. If you use MC Command Center, update it before anything else — it's usually one of the first mods to get a compatible release after a patch.
4. Check the EA Forums broken-mods thread linked above, or Scarlet's Realm's compatibility list, for whether your specific mods already have fixes out.
5. Remove mods you don't recognize. Old, unmaintained mods are the most likely to stay broken the longest.