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  • Modpack Issues
    • Java
    • "Failed to download file" in CurseForge Client / "Error Code 0"
    • The System cannot find the file Specified" error (Windows OS)
      • Reinstalling the Launcher
      • Fixing the Command Prompt (cmd.exe)
    • Invalid Modding Folder Path
    • Import Error
    • Custom Profile (modpack) Not Launching
  • Game/Launcher Issues
    • "An access violation occurred when attempting to install Minecraft launcher"
    • "An unexpected error occurred while trying to install Minecraft"
    • Can only play Demo
    • Clicking 'Play' in Minecraft's Launcher Doesn't Start the Game (McAfee Real-Time Scanning)
    • "Failed to create Minecraft directories"
    • "Failed to download Minecraft launcher due to a network error"
    • "Failed to install Minecraft launcher" (download error)
    • "Failed to install Minecraft launcher" (parsing error)
    • "Failed to unzip Minecraft launcher"
    • No sound in game
    • The legacy Minecraft launcher open instead of the current one

Modpack Issues


Java ▾

Java is required to run Minecraft modpacks. If you don't have Java installed on your system, you will likely receive the following Windows system message when trying to launch modpacks:

Both in this case, and in cases where you do have Java but are still experiencing issues running modpacks - installing the latest Java version can solve the issue.
Please follow these steps to install the latest Java version:

  1. Download the latest Java version available here: https://java.com/download (your operating system should be automatically detected, or you can choose it manually here: https://www.java.com/en/download/manual.jsp).

  2. Run the installation:


    *Please note that Java will be installed by default inside the system's Program Files directory. If you are not a Windows admin user, you may not have a permission to continue the installation, and you will need to ask a system admin to assist you with the installation:

    *Please note that Java will be installed by default inside the system's Program Files directory. If you are not a Windows admin user, you may not have a permission to continue the installation, and you will need to ask a system admin to assist you with the installation:

  3. Restart the CurseForge app and try to launch your modpack(s) again.

"Failed to download file" in CurseForge Client / "Error Code 0" ▾

You can fix this using the 'Repair Installation' button - Please read more about this solution.

The System cannot find the file Specified" error (Windows OS) ▾

If you're trying to launch modpacks but nothing is happening, or the error message "The System cannot find the file Specified" shows up, please try the following solutions:

  • Reinstalling the Launcher ▾

    To reinstall the launcher, open the menu to your right and select 'Repair installation'. Then, try to launch a modpack again.

  • Fixing the Command Prompt (cmd.exe) ▾

    If the error "CMD configuration may be causing issues" shows up, it means that CurseForge cannot access the Command Prompt file (C:\Windows\System32\cmd.exe) in your system.

    If the file has been modified, or its name has been changed - please restore it to its original state and try to launch your modpacks again.
    If you can run the Command Prompt but it closes as soon as it starts - that could indicate a corruption due to malware. To fix the corruption, you can follow the steps in this guide, but

    please note that it should be done very carefully as it requires you to handle your system's registry

    .

Invalid Modding Folder Path ▾

If you've come across an error where trying to set a modding folder, please make sure you did not select a path that is invalid, for example:

  • The desktop or a folder within the desktop
  • A OneDrive folder, or any folder within the OneDrive directory
  • The Vanilla Minecraft directory (C:\Users\[user]\AppData\Roaming\.minecraft\)
  • A path that contains non-English letters
  • A root folder (C:\, D:\, etc.), as in - the first or top-most directory in a hierarchy


If you're not sure which directory to select, we recommend keeping the default path suggested by the app - C:\Users\[user]\curseforge\, or creating a new folder outside of the C:\Users directory, like C:\CurseForge or D:\CurseForge and selecting that.

Import Error ▾

If you received an error when trying to import a modpack, please make sure that the modpack's ZIP file is valid and properly structured. The ZIP must contain a manifest.json file inside it.

If you aren't sure about the validity of the ZIP file, please reach out the creator of the modpack or send the file to us, and we will do our best to help.

Custom Profile (modpack) Not Launching ▾

If there are incompatibilities in your modpack between mods, or between the modloader and the mods you're trying to run, you can ask for help from the Minecraft community in the official CurseForge Discord Server. Check out our article as well for extra tips!

Game/Launcher Issues

"An access violation occurred when attempting to install Minecraft launcher"▾

Please make sure that your system user has sufficient permissions (read/write) to your modding folder, or try installing the modding folder on a different drive.

"An unexpected error occurred while trying to install Minecraft" ▾

We are currently working on this issue, and any additional information would be helpful.
Please contact us and we will make sure to get back to you!

Can only play Demo ▾

If you're launching a modpack but the game's button says 'Play Demo' (instead of 'Play'), like so:


Please try to log out and back in:

Or repair the installation from the app:

Clicking 'Play' in Minecraft's Launcher Doesn't Start the Game (McAfee Real-Time Scanning)▾

If you're clicking 'Play' in Minecraft's launcher and the game doesn't start loading within a short time, please check if you have McAfee's Real-Time Scanning option enabled. If so, please disable and relaunch the modpack.

"Failed to create Minecraft directories" ▾

We are currently working on this issue, and any additional information would be helpful.
Please contact us and we will make sure to get back to you!

"Failed to download Minecraft launcher due to a network error" ▾

Please make sure that your network connection is stable and that your firewall/antivirus are not blocking Minecraft and/or Overwolf.

"Failed to install Minecraft launcher" (download error) ▾

Please make sure that your network connection is stable and that your firewall/antivirus are not blocking Minecraft and/or Overwolf.

"Failed to install Minecraft launcher (parsing error)" ▾

We are currently working on this issue, and any additional information would be helpful.
Please contact us and we will make sure to get back to you!

"Failed to unzip Minecraft launcher" ▾

No sound in game ▾

If you can't hear the game's sounds when launching a modpack, please reload the game's assets by pressing F3+T (after entering single/multiplayer):

The legacy Minecraft launcher open instead of the current one ▾


If you're seeing this legacy launcher instead of the current one when launching a modpack, please follow these steps (Windows OS):

  1. Open Overwolf's installation folder (default: C:\Program Files (x86)\Overwolf)
  2. Right click the 'OverwolfLauncher.exe' file
  3. Select 'Properties'
  4. Go to the 'Compatibility' tab
  5. The box for 'Run this program in compatibility mode for:' should be unchecked

  6. Once you uncheck the box, click 'Apply' and restart Overwolf.
  7. Launch CurseForge and try to launch a modpack.