Content Manager not working
If Content Manager won't open, crashes on launch, or can't find Assetto Corsa, the fix is usually quick. This guide covers every common cause and the steps to resolve it — from SmartScreen warnings to corrupt mod conflicts.
Common Content Manager problems and fixes
| Problem | Fix | How common |
|---|---|---|
| Content Manager won't open at all | Run as Administrator. Reinstall .NET Framework 4.8. Check Windows Event Viewer for the crash cause. | Very common |
| Windows SmartScreen warning blocks launch | Click "More info" then "Run anyway". Safe only if downloaded from assettocorsa.club. | Normal on first launch |
| Error: can't find Assetto Corsa | Go to Settings → Assetto Corsa → Main and set the game path manually to your AC install folder. | Very common |
| Game launches but crashes to desktop | Disable CSP in CM Settings → Custom Shader Patch. If the game starts, update or reconfigure CSP. | Common |
| Content Manager stuck on "Loading content" | A corrupt mod is stalling the content scan. Temporarily move recent cars/tracks out and restart CM. | Common |
| Missing Python or .NET error on launch | Install Python 3.3 (32-bit) from python.org and .NET Framework 4.8 from Microsoft. Both are free. | Common |
| CM settings window won't open | Delete the CM config at %LOCALAPPDATA%\AcTools Content Manager and restart. Settings reset to default. | Rare |
| Online server list is empty | Check Content Manager Settings → Online → Server list source. Enable the CM or KunosServer source. | Common |
How to diagnose and fix Content Manager launch problems
- 1 Confirm you have the official Content Manager file
Content Manager must be downloaded from assettocorsa.club — the only legitimate source maintained by developer x4fab. Files from unofficial mirrors may be incomplete, outdated or modified. If you are unsure, re-download from assettocorsa.club and replace the existing executable before trying anything else.
- 2 Run Content Manager as Administrator
Right-click the Content Manager executable and select "Run as Administrator". Permissions issues prevent CM from reading or writing the Assetto Corsa directory on some Windows configurations. If CM opens correctly as Administrator, set it to always run elevated: right-click → Properties → Compatibility → tick "Run this program as an administrator".
- 3 Allow Content Manager through Windows SmartScreen
Windows SmartScreen may block the application with a warning. Click "More info" and then "Run anyway". SmartScreen flags any program not widely distributed through the Microsoft Store — this warning is not specific evidence of a problem. Proceed only if you downloaded the file from assettocorsa.club.
- 4 Install .NET Framework 4.8 and Python 3.3
Content Manager requires .NET Framework 4.8 and Python 3.3 (32-bit). Search in Windows Start for "Turn Windows features on or off" and confirm .NET Framework is enabled. If CM shows a Python error, download the Python 3.3.0 Windows x86 installer from python.org and install it. Both are free.
- 5 Set the Assetto Corsa game path manually
If CM opens but cannot find the game, go to Settings → Assetto Corsa → Main and click the folder icon next to the game path. Navigate to your Assetto Corsa installation folder — for Steam this is typically C:\Program Files (x86)\Steam\steamapps\common\assettocorsa. The correct folder contains the file acs.exe.
- 6 Test without mods and without CSP
If the game crashes after launching from CM, disable CSP first: go to Content Manager Settings → Custom Shader Patch and toggle off the current CSP version. Start a session. If the game runs cleanly, the issue is a CSP conflict — update CSP to the latest stable release from within Content Manager. If it still crashes, open the CM content library and look for mods marked with errors or missing data — remove those and test again.
Where to get help with Content Manager issues
If the steps above don't resolve your issue, these are the best places to get further help:
- The official Content Manager thread on overtake.gg — developer x4fab and an active community troubleshoot issues there. Search for your specific error message first, as most problems have already been documented and solved.
- r/assettocorsa on Reddit — a large community with an active help thread. Include your Windows version, whether the game starts without CM, CSP version, and the exact error message.
- Assetto Corsa Steam Discussions — useful for game-level issues that appear before or after CM's involvement, or for verifying whether a problem is game-specific.
Content Manager not working — common questions
Why won't Content Manager open?
Content Manager most commonly fails to open because of missing .NET Framework 4.8, a permissions problem on the Assetto Corsa folder (fix: run as Administrator), or because the file was downloaded from an unofficial source and is corrupt. If CM opens briefly then closes without showing anything, check the Windows Event Viewer — search in Start menu, open Event Viewer → Windows Logs → Application — for the specific crash reason. Reinstalling .NET Framework 4.8 from Microsoft and re-downloading CM from assettocorsa.club resolves the majority of cases.
Why does Content Manager say it can't find Assetto Corsa?
Content Manager cannot find Assetto Corsa when the game path is not set or points to the wrong folder. Go to Settings → Assetto Corsa → Main and click the folder icon to manually browse to the Assetto Corsa installation directory. For Steam installations, this is typically at C:\Program Files (x86)\Steam\steamapps\common\assettocorsa. The folder should contain the file acs.exe. If you installed Steam to a custom location, navigate there instead.
Is it safe to click "Run anyway" on the SmartScreen warning?
Yes, it is safe to click "Run anyway" on the Windows SmartScreen warning for Content Manager, provided you downloaded the file from assettocorsa.club — the official site maintained by developer x4fab. SmartScreen shows this warning for any program not distributed through the Microsoft Store, regardless of whether it is safe. It is not specific evidence of a threat. If you downloaded Content Manager from any site other than assettocorsa.club, delete the file and re-download from the official source before proceeding.
What do I do if Content Manager crashes the game?
If the game crashes after launching from Content Manager, the most common causes are a CSP conflict or a corrupt mod. First, disable CSP in Content Manager Settings → Custom Shader Patch and try launching — if the game starts, update CSP to the latest stable release within Content Manager. If the game still crashes without CSP, verify game files through Steam (right-click Assetto Corsa → Properties → Local Files → Verify integrity of game files). Check the CM content library for any mods with errors or missing data and remove them.
How do I reset Content Manager to default settings?
To reset Content Manager to factory settings, close CM completely, open Windows File Explorer, paste %LOCALAPPDATA%\AcTools Content Manager into the address bar and press Enter. Delete the folder or rename it to create a backup. When you restart Content Manager it creates fresh default settings and asks you to set the game path again. Your Assetto Corsa game files, mods and CSP installation are not affected — only Content Manager's own configuration is reset.
Why is Content Manager stuck loading?
If Content Manager is stuck on a loading screen or takes an unusually long time to scan content, a corrupt or malformed mod is likely stalling the content indexing process. Close CM, open your Assetto Corsa\content\cars folder in File Explorer, and temporarily move out any recently added cars. Repeat for the tracks folder. Restart CM — if it loads normally, add the moved content back one folder at a time to identify the problematic mod. Once found, delete it and reinstall from the original source.
Need to reinstall Content Manager?
A clean reinstall takes two minutes. Download the genuine file directly from the official source and start fresh.
Reinstall Content Manager