Issues with the Forge modloader can be identified in two ways:
- A message that says "An error occurred while executing Forge install command. Exit code: 1"
- The 'Install' buttons for modpacks turn grey after clicking them, and the modpacks don't get installed
First, please try relaunching the app and repairing the Minecraft installation:
If that doesn't fix it, try the following solutions in this article.
Take me to...
Make sure that Overwolf and CurseForge are not getting blocked by your firewall and/or antivirus software.
If you have a proxy connection set up on your system, please try to temporarily disable it to check if it has any effect on the issue. You will need to make sure both "Use setup script" and "Use a proxy server" are disabled.
Follow Microsoft's guide, How to reset the Hosts file back to the default.
Try to temporarily disable any VPN programs you have running, as they may interrupt the connection required for CurseForge to install the necessary Java or Forge files.
Private Relay (macOS)
If you're using CurseForge on macOS, try to temporarily disable the Private Relay option located under iCloud.
Try reinstalling or updating Java. You can find the latest Java version here: https://www.java.com/en/download/